Monday

October 24, 2016
Number of results: 72,878

**physics**

As part of a class project you are given 0.900 g of nichrome and asked to fabricate a wire with uniform cross-section. You use up 95% of the nichrome and make a wire with a resistance of 0.840 Ω. The resistivity of nichrome is 1.00 10-6 Ω m and its density is 8.31 ...

*September 15, 2013 by Justin*

**Physics: Diameter of a nichrome wire**

If 49 m of nichrome wire is to have a resistance of 13.0 ohms at 20C, what diameter wire should be used? I've done this: (108e-8)(49)/10.0 ohms = 5.29e-6m^2 Then 5.29e-6m^2/pi then r = sqrt(1.68e-6m^2) and got .00129 = 1.29e-3 1.29mm r=2(1.29mm) = 2.58mm But this is wrong. ...

*September 9, 2010 by Sar*

**Physics**

Calculate the resistance per unit length of a nichrome wire, which has a radius of 0.436 mm. The resistivity of nichrome is 1.510−6 Ωm. Answer in units of Ω/m If a potential difference of 20 V is maintained across a 3.7 m length of the nichrome wire, what is...

*February 24, 2012 by Kudo*

**physics**

A toaster uses a Nichrome heating wire. When the toaster is turned on at 20C, the initial current is 1.50 A. A few seconds later, the toaster warms up and the current has a value of 1.22 A. The average temperature coefficient of resistivity for Nichrome wire is 4.5 10-4 (C)-...

*January 30, 2008 by rick*

**physics**

A toaster uses a Nichrome heating wire. When the toaster is turned on at 20C, the initial current is 1.50 A. A few seconds later, the toaster warms up and the current has a value of 1.20 A. The average temperature coefficient of resistivity for Nichrome wire is 4.5 10-4 (C)-...

*February 28, 2010 by Anonymous*

**science**

find the resistance of a nichrome wire of length 2.2m& diameter 2mm.

*April 19, 2016 by Samiksha*

**Physics**

The heating element of a simple heater consists of a 2.2m--long, 0.70mm--diameter nichrome wire. When plugged into a 120 V outlet, the heater draws 7.5 A of current when hot. I found that the wire's resistance when it was hot was 16 ohms. Now using this answer of 16 ohms ...

*October 21, 2011 by Kayla*

**physics **

A total charge of 25 mC passes through a cross-sectional area of a nichrome wire in 10 s. What is the current in the wire? Choose one answer. a. 2.5 A b. 2.5 mA c. 25 mA d. 2.5 A

*May 31, 2011 by ashley --- HELP PLEASEE!!!*

**physics**

A wire of nichrome of length 80cm has a resistance of 50 ohms. if the wire is four folded, find new resistance.

*August 29, 2016 by vanditha*

**Physics**

A nichrome wire has a radius of 0.50 mm and a resistivity of 1.5 10‑6 W‑m. What is the resistance per unit length of this wire?

*February 23, 2011 by Kevin*

**Physics**

A nichrome wire has a radius of 0.50 mm and a resistivity of 1.5 10‑6 W‑m. What is the resistance per unit length of this wire?

*February 24, 2011 by Anthony*

**Physics**

You need to make a 100 microH inductor on a cylinder that is 5.0 cm long and 1.0 cm in diameter. You plan to wrap four layers of wire around the cylinder. What diameter wire should you use if the coils are tightly wound with no space between them? The wire diameter will be ...

*April 13, 2008 by Jill*

**Physics**

A piece of Nichrome wire has a radius of 8.0 10-4 m. It is used in a laboratory to make a heater that dissipates 2.00 102 W of power when connected to a voltage source of 120 V. Ignoring the effect of temperature on resistance, estimate the necessary length of wire.

*September 7, 2007 by Mary*

**physics**

a copper wire with a diameter of 1.5mm is joined to an aluminium wire which has a diameter of 2.3mm.the wire carries a current of 12A.what is the current density in each wire

*February 18, 2016 by mat*

**Physics**

A wire is supposed to be 0.10 millimeter in diameter. Laser light of wavelength 670 nm shining onto the wire creates a diffraction pattern on a wall that is 4.5 meters behind the wire. The central maximum of that diffraction pattern is 6.3 centimeters wide. What is the ...

*June 1, 2016 by ?*

**PHYSICS**

A FORCE OF 40N IS Applied at the end of wire 4m long and produced an extention of 0.24mm if the diameter of wire is 2.00mm.calculate stress on wire and strain in the wire

*June 5, 2016 by ESTHER*

**Physics**

Look up or derive the frequencies of the standing waves of a length of wire, L, clamped at the ends and under tension. What are the similarities and differences between a vibrating string and a resonating pipe? Does the diameter of the wire matter? Does the diameter of the ...

*February 8, 2007 by Krys*

**Chemisty**

Wire is often sold in pounds spools according to the wire guage number. That number refers to the diameter of the wire. How many meters are in 3-Ib spool of 12 gauge aluminum wire? A 12-guage wire has a diameter of 0.0808 in. Aluminum has a density of 2.70 g/cm^3. (V=3.14r^2L)

*January 19, 2012 by love*

**physics**

The magnetic ﬁeld in a loudspeaker is 0.2 T. The wire consists of 308 turns wound on a 4.12 cm diameter cylindrical form. The resistance of the wire is 8.2 Ω. Find the force exerted on the wire when 15.8 V is placed across the wire. Answer in units of N

*March 3, 2011 by Anonymous*

**physics**

Suppose that you wish to fabricate a uniform wire out of 0.900 g of copper. Assume the wire has a resistance R = 0.500 , and all of the copper is used. (a) What will be the length of the wire? (m) (b) What will be the diameter of the wire? (m)

*September 17, 2010 by lynette*

**physics**

i need to investigate nichrome wire and a globe and i need to state which is an ohmic conductor. what will my method be??

*August 12, 2012 by gontse*

**physics**

A light rigid bar is suspended horizontally from two vertical wires, one of steel and one of brass. Each wire is 2.00m long. The diameter of the steel wire is 0.60mm and the length of the bar AB is 0.20m. When a mass of 10.0kg is suspended from the centre of AB the bar remains...

*March 27, 2010 by Edwin*

**physics**

A light rigid bar is suspended horizontally from two vertical wires, one of steel and one of brass. Each wire is 2.00m long. The diameter of the steel wire is 0.60mm and the length of the bar AB is 0.20m. When a mass of 10.0kg is suspended from the centre of AB the bar remains...

*March 28, 2010 by Edwin*

**Physics**

A wire of length 5.0 m and diameter 2.0 mm extends by 0.25 mm when a force of 50 N was used to stretch it from its end. Calculate the (a)stress on the wire (b)strain in the wire

*May 24, 2015 by Saka*

**college physics**

A 4m long copper wire has a diameter of 2mm and carries a current of 10A. Determine the ff: a. current density in the wire b. electric field c. potential difference between the ends of the wire d. resistance of the wire

*February 25, 2013 by Zell*

**physics**

A circular steel wire 2.00 m is to stretch no more than 0.25 cm when a tensile force of 400 N is applied to each end of wire. What minimum diameter is required for the wire?

*August 22, 2009 by colleen*

**physics**

A wire of diameter 0.65mm and length 6.0m stretches 10mm when 5.5kg is hung from it. What is the Young's modulus for the wire and what is the effective spring constant for the stretching wire

*April 19, 2012 by Kirk*

**physics**

With a magnetic field perpendicular to a single 13.2 cm diameter circular loop of copper wire decreases uniformly from .670 T to zero. If the wire is 2.25 mm in diameter how much charge moves past a point in the coil during this operation?

*April 28, 2014 by jon*

**University Physics**

A hollow copper wire with an inner diameter of 0.60mm and an outer diameter of 1.8mm carries a current of 15A. What is the current density in the wire?

*March 22, 2013 by Wolf*

**Physics**

A long horizontal wire carries a current of 48A . A second wire, made of 2.6mm diameter copper wire and parallel to the first, is kept in suspension magnetically 15cm below(Figure 1) . Determine the magnitude of the current in the lower wire.

*April 8, 2013 by bud*

**physics**

A long horizontal wire carries a current of 48A . A second wire, made of 2.6mm diameter copper wire and parallel to the first, is kept in suspension magnetically 15cm below(Figure 1) . Determine the magnitude of the current in the lower wire.

*April 8, 2013 by bud*

**Math**

The electrical resistance of a wire waves directly as its length & inversely as the square of its diameter if a wire 30m long and 0.75mm in diameter has a resistance of 25ohms , find the length of a wire of the same material whose resistance is 30ohms whose diameter is 1.25mm ...

*January 29, 2016 by Helena*

**college algebra**

The electrical resistance of a wire of a given material varies as its length and inversely as the square of the diameter. if a wire 300 feet long and 0.05 inches in diameter has a resistance of 30 ohms, (a) find the resistance of a wire which is 1000 feet long and 0.02 inch in...

*April 5, 2016 by Sam*

**Physics**

A weight of 40N was attached to the end of a wire during modulus experiment, if the length of the wire is 4m and the diameter is 0.44mm and the extension recorded is 0.30mm. calculate the stress and strain of the wire?. take[Pi=3.142

*January 22, 2011 by Ochuko*

**Physics**

Two wires with the same resistance have the same diameter but different lengths. If wire 1 has length L1 and wire 2 has length L2, how do L1 and L2 compare if wire 1 is made from copper and wire 2 is made from aluminum? The resistivity of copper is 1.7 10-5Ωm and the ...

*October 15, 2010 by Max*

**physics**

. A copper wire 1.00 mm in diameter is used to support a mass of 6.0 kg. If the wire was stretched by 2.00 mm, what was the original length of the wire? Y = stress/ strain r= 0.5 mm =5 X 10-4 m e= 2mm or 2 X 10-3 Given : m = 6 kg F = 60 N A =π r2 = ( 3.14)( 5 X 10-4) (5 X...

*March 19, 2015 by arlene*

**physics**

Find the diameter of an 18 m(L) long steel wire that will stretch no more than.009 m AL when a load stress of 3800 N is hung on the end of the wire. The Young's Modulus for steel wire is 200 x 109 N/m2?

*December 27, 2013 by farid*

**physics**

in the searler's metod to determine the young's modulus of a wire , a steel wire of length 156cm and diameter 0.054cm is taken as experimental wire. the average increase in length for 1 1/2 kg wt is found to be o.o5o cm.Then young's modulus of the wire? ANS: 1.)2.002* 10^11 N/m

*February 4, 2013 by kalawathi*

**Physics**

A silver wire and a platinum wire of the same length have the same resistance. What is the ratio of the diameter of the silver wire to that of the platinum wire. I did 10.6E-8/1.59E-8 but am not getting correct answer?

*February 10, 2012 by jason*

**Physics **

Suppose a straight 1.60mm -diameter copper wire could just "float" horizontally in air because of the force due to the Earth's magnetic field B⃗ , which is horizontal, perpendicular to the wire, and of magnitude 4.210−5T . What current would the wire carry?

*February 22, 2014 by Anonymous*

**Statics**

An aluminum wire has a diameter of d in. Determine the minimum diameter D of the coil in which the wire can be wound without exceeding a bending stress of 30,000psi

*April 23, 2012 by Mary*

**Physics**

You've made the finals of the Science Olympics! As one of your tasks, you're given 1.1g of copper and asked to make a cylindrical wire, using all the metal, with a resistance of 1.7 Ohm. What length l will you choose for your wire? What diameter d will you choose for your wire?

*February 17, 2010 by Anthony*

**Physics**

1.A brass wire 80 cm long and 0.3 cm in diameter is used to hang an object weighing 6.5 x 10 ^5 dynes. Find stress, strain and young's modules. 2. To one end of a wire 1.2 m long and 0.4 cm in diameter is hung on object with a mass of 10 kg. The wire is found to be elongate 1....

*September 3, 2014 by Midnight*

**physics**

A 15 ohm resistor is made from a copper wire of mass 14.2 grams. What is the wire's diameter and length?

*March 4, 2013 by lindsey*

**Physics**

An 8 kg mass is supported by an aluminum wire of length 80 cm abd diameter 2.0mm. How much will the wire stretch?

*September 23, 2015 by Grace*

**Physics**

An 8 kg mass is supported by an aluminum wire of length 80 cm abd diameter 2.0mm. How much will the wire stretch?

*September 24, 2015 by Grace*

**Physics ||**

Q.1. Two wires each of length 40 m and diameter 2.6 mm, are connected in series. A potential difference of 50 V is applied between the ends of the composite wire. The resistances the wires are 0.13 Ω and 0.75 Ω, respectively. Determine: i) the current density in each...

*June 4, 2014 by Meemee.meme*

**physics**

A 50.0-g sample of a conducting material is all that is available. The resistivity of the material is measured to be 11~ 10-8 m and the density is 7.86 g/cm3. The material is to be shaped into a solid cylindrical wire that has a total resistance of 1.5 . a) What length of...

*November 15, 2012 by Amber*

**Physics II**

A 51.0 g sample of a conducting material is all that is available. The resistivity of the material is measured to be 12 10-8 m, and the density is 7.67 g/cm3. The material is to be shaped into a solid cylindrical wire that has a total resistance of 1.5 . What length of wire ...

*March 7, 2013 by Stephanie*

**Physics**

A 14.0 ohm resistor is made from a coil of copper wire whose total mass is 23.0 g. What is the diameter of the wire, and how long is it?

*February 6, 2011 by George*

**physics**

1. Two identical 15.0 kg balls, each 25.0 cm in diameter, are suspended by two 35.0 cm wires as shown in the figure. The entire apparatus is supported by a single 18.0 cm wire, and the surfaces of the balls are perfectly smooth. Find the tension in the left 35.0 cm wire. 2. ...

*September 25, 2012 by Anonymous*

**Physics **

A copper wire of diameter 0.30mm and length 1.50m is joined to another steel wire of same diameter and length 1.20m. The copper part of the double wire is hung vertically to a fixed point, while a small weight is connected to the lower end of the steel part. Joining the two ...

*October 31, 2013 by Cali*

**Physics**

A silver wire and a platinum wire of the same length have the same resistance. What is the ratio of the diameter of the silver wire to that of the platinum wire.

*February 9, 2012 by jason*

**Physics**

What is the mass of a copper wire that will give a wire, 0.20mm in diameter, a resistance of 400 ohms can you please show me the formulas

*November 25, 2015 by John*

**electricity**

Is there any data about the use of nichrome heating, for instance: a nichrome element in the cables of electric kettles, geysers and spiral stove? What do you mean by "data"? What physical data are you looking for: resistivity?

*February 7, 2007 by tigger needs help*

**Physics**

You've made the finals of the Science Olympics! As one of your tasks, you're given 1.8g of copper and asked to make a wire, using all the metal, with a resistance of 1.3 Ohm. Copper has a density of 8900 kg/m^3. What length will you choose for your wire(in meters)? What ...

*February 17, 2010 by Anthony*

**Physics**

A straight copper wire that is 1 milimeter in diameter carries a current of 20 miliamps. Whas the magnitude of the largest magnetic field created by this wire in Tesla?

*December 12, 2013 by Anonymous*

**physics**

A straight copper wire that is 1 milimeter in diameter carries a current of 20 miliamps. Whas the magnitude of the largest magnetic field created by this wire in Tesla?

*December 18, 2013 by akameno*

**Algebra joint, inverse and direct variation **

Urgent! If t varies inversely as the cube of z and directly as the square of r, and t=4 when z=3 and r=6, find t when z=6 and r=9. T= k (square) r/(cubed) z 4=k (square) 6/ (cubed) 3 The electrical conductance of a wire varies directly as the square of its a diameter and ...

*February 20, 2016 by George Smith*

**engineering physics 2**

A 19 m long piece of wire of density 8.34 g/m3 has a diameter of 12.593 mm. The resistiv- ity of the wire is 1.7e-8(ohm)(m) at 20 degrees celsius. The temperature coefficient for the wire is 0.0038(degrees celsius)^-1. Calculate the resistance of the wire at 20degrees Celsius...

*February 28, 2008 by David*

**physics**

copper has 8.5 x 10^28 electrons per cubic meter. (a) how many electrons are there in 30 cm length a 12 gauge copper wire (diameter 2.05 mm)? (b) if a current of 1.55 A is flowing in the wire, what is the average drift speed of the electrons along the wire? (There are 6.24 x ...

*October 8, 2012 by jewel*

**Algebra**

If t varies inversely as the cube of z and directly as the square of r, and t=4 when z=3 and r=6, find 9. T= k (square) r/(cubed) z 4=k (square) 6/ (cubed) 3 The electrical conductance of a wire varies directly as the square of its a diameter and inversely as its length. The ...

*February 20, 2016 by George*

**Algebra**

If t varies inversely as the cube of z and directly as the square of r, and t=4 when z=3 and r=6, find 9. T= k (square) r/(cubed) z 4=k (square) 6/ (cubed) 3 The electrical conductance of a wire varies directly as the square of its a diameter and inversely as its length. The ...

*February 20, 2016 by George*

**physics, university**

A 50.0-g sample of a conducting material is all that is available. The resistivity of the material is measured to be 11 x 10-8 ohms/m and the density is 7.86 g/cm3. The material is to be shaped into a solid cylindrical wire that has a total resistance of 1.5 ohms. a) What ...

*November 19, 2012 by Emma*

**Alegra II**

If 750 m of 3.00-mm-diameter wire has a resistance of 27.6, what length of similar wire 5.00 mm in diameter will have the same resistance?

*November 21, 2011 by Arielle*

**Algebra II**

If 750 m of 3.00-mm-diameter wire has a resistance of 27.6, what length of similar wire 5.00 mm in diameter will have the same resistance?

*November 21, 2011 by Ashley*

**Math**

If 750 m of 3.00-mm-diameter wire has a resistance of 27.6, what length of similar wire 5.00 mm in diameter will have the same resistance?

*November 22, 2011 by Zoey*

**Algebra II **

If 750 m of 3.00-mm-diameter wire has a resistance of 27.6, what length of similar wire 5.00 mm in diameter will have the same resistance?

*November 22, 2011 by Marie*

**Math**

If 750 m of 3.00-mm-diameter wire has a resistance of 27.6, what length of similar wire 5.00 mm in diameter will have the same resistance?

*November 22, 2011 by Jake*

**Physics**

A 2.2m of steel wire hangs vertically down from a support. A 1.5m length of brass wire of the same diameter is attached to the lower end of the steel wire.when a 10 kg mass is attached to the lower end of the brass wire a total extension of 0.05 m is produced. by how much does...

*January 10, 2013 by Joseph*

**Physics - Please Help!**

I really need help on these questions because I have a test tomorrow and don't understand how to do them. 1) A wire of diameter 0.6mm is placed in the path of light coming from a laser. Light diffracts around both sides of the wire; the diffracted waves then interfere with one...

*June 10, 2008 by Alex*

**Physics**

A small sphere has a hole drilled in it and it is placed onto a wire. The wire is bent into a circle of radius 15 centimeters. The sphere can slide freely without friction around the circular wire. The circular wire is held vertically. (a) If the circular loop of wire is spun ...

*November 24, 2015 by Kyle*

**physics**

the resistance of copper wire of length 1m is 0.1 ohm the diameter of the wire is 0.045cm find its specific resistance

*March 5, 2013 by amit kumar*

**Physics/electricity**

Eighteen-gauge wire has a diameter of 1.024 mm. Calculate the resistance of 19 m of 18 gauge lead wire at 20C.

*October 6, 2013 by Joe*

**physics**

a copper wire has a diameter of o.5mm and resistivity of 1.6*10power 6 ohm cm.calculate the length of wire which will be necessary to make 10 ohm coil

*June 16, 2014 by kanika*

**physics, **

A 4.0kg object is supported by an aluminum wire of length 2.5 m and diameter 1.8 mm How much will the wire stretch? I need the breakdown of how this is being solved so I can figure it out in the future. Even just a formula will do

*April 12, 2011 by Dorian*

**physics**

Two wires are made of the same material. The first wire dissipates power P with a current of I. If the second wire is 3 times as long and has twice the diameter, what will the current need to be through the second wire to dissipate the same power P as the first wire? A ...

*June 3, 2014 by dominic hart*

**maths-mensuration**

The boy having a gold coin of diameter 2cm and thickess 2mm to a goldsmith for melting and drawing into a wire of diameter 1mm . the gold smith gave back a wire of gold of length 76cm with diameter 1mm. if the wastage allowed in melting could be a maximum of 5% of the total ...

*March 10, 2013 by anoynomous*

**Physics**

The force on a wire is a maximum of 6.5E-2 N when placed between the pole faces of a magnet. The current flows horizontally to the right and the magnetic field is vertical. The wire is observed to "jump" toward the observer when the current is turned on. If the pole faces have...

*December 2, 2012 by Lorii*

**Physics**

What length of #22 B&S gauge copper wire is needed to make a resistance of 500 ohms? This is what I came up with but don't think it is correct. looked up diameter for #22 gauge wire = .643 mm and converted to m 6.46 * 10^-4. Used Eq. A = (pi)(d^2)/4 => A = (pi)(6.43 * 10^-4...

*September 7, 2012 by Kevin*

**physics**

the resistance of 100.0cm of constantan wire whose diameter of cross-section is 0.55m is 5ohm find the resistivity of constantan wire

*August 4, 2009 by matrix school 2*

**physics**

a metal wire 1.0 mm in diameter and 2.0 m long hangs vertically with a 5.0 kg mass suspended from it. if the wire stretches 1.2 mm under the tension, what is the value of the young's modulus for metal?

*January 10, 2011 by pat*

**physics**

A wire is made of a material with a resistivity of 4.85109 10−8 Ω m . It has length 5.57436 m and diameter 0.36396 mm . What is the resistance of the wire? Answer in units of Ω

*May 7, 2013 by Anonymous*

**physics**

The force on a wire is a maximum of 7.33E-2 N when placed between the pole faces of a magnet. The current flows horizontally to the right and the magnetic field is vertical. The wire is observed to "jump" toward the observer when the current is turned on. If the pole faces ...

*October 11, 2010 by VJC*

**Algebra II**

The resistance of a wire is inversely proportional to the square of its diameter. If an AWG (American wire gauge) size 12 conductor (0.0808-in. diameter) has a resistance of 14.8, what will be the resistance of an AWG size 10 conductor (0.1019-in. diameter) of the same length ...

*November 21, 2011 by Arielle*

**Math**

The resistance(r)of a wire varies directly as the length(L)of the wire and inversely as the square of the diameter(d). If the resistance is 9ohms in 50ft of wire that has a diameter of 0.05in, find the resistance in 50ft of a similar wire that has a diameter of 0.02in. ...

*September 22, 2006 by Amber*

**Physics**

A 550 turn solenoid is 15 cm long. The current in it is 33 A. A 3.0 cm long straight wire cuts through the center of the solenoid, along a diameter. This wire carries a 22 A current downward( and is connected by other wires that don't concern us). What is the force on this ...

*March 2, 2008 by jenish*

**college physics**

How to do this problem? Compute the number of turns of wire on a coil whose resistance measures 15.5 ohms, and which is wound around a 2-inch diameter form in a single layer of 28 gage enameled copper wire.

*April 4, 2010 by Mike*

**Physics**

a wire 100 cm long and 0.2 cm in diameter is suspended from a support. a 10 kg mass is hung from the lower end of the wire. a find the stress b find the strain c young's modulus of elasticity

*January 13, 2015 by Charlotte*

**Heat Transfer**

A hot-wire anemometer is a temperature-based instrument for measuring velocities in a flowing gas. The key component of the device is a very fine wire (diameter = 0.0004 in., length = 0.20 in.) that is electrically heated. The wire is positioned so that the air stream passes ...

*August 3, 2012 by Rangen*

**Physics**

1) Suppose that you wish to fabricate a uniform wire out of 1.15 g of copper. Assume the wire has a resistance R = 0.600 , and all of the copper is used. (a) What will be the length of the wire? m? (b) What will be the diameter of the wire? m? 2) A rectangular block of copper...

*October 4, 2010 by Max*

**Physics**

1) Suppose that you wish to fabricate a uniform wire out of 1.15 g of copper. Assume the wire has a resistance R = 0.600 , and all of the copper is used. (a) What will be the length of the wire? m? (b) What will be the diameter of the wire? m? 2) A rectangular block of copper...

*October 4, 2010 by Tommy*

**Physics**

A total charge of 16C passes through a cross-sectional area of a nichrome wire in 4 s. How many electrons pass through the cross-sectional area in 16 s? This has to do with Electric current and so i know that means 16C = 16 x 10^-6 = 1.6x10^-5.

*January 19, 2013 by Struggling Student*

**physics**

Two spherical conducting wires A and B are connected to the same potential difference. Wire A is three times as long as wire B, with a radius double that of wire B and resistivity doubles that of wire B. What is the power delivered to wire A to the power delivered to wire B?

*November 13, 2013 by Anton*

**College Physics**

A current exists in a wire that gradually narrows down to a smaller diameter. How do the drift velocity, the current density, and the electric field vary along the wire? Can you please help explain this?

*February 4, 2010 by Sally*

**physics**

Consider an aluminum wire with 1 mm diameter below its critical temperature of 1.2 Kelvin. It's critical magnetic field is 0.01 Tesla. What is the maximum current in Amps that you can send down this wire for it to remain superconducting?

*December 1, 2013 by Collin*

**Physics**

A wire is made of a material with a resistivity of 2.08184 10−8 Ω m . It has length 4.42917 m and diameter 0.6763 mm . What is the resistance of the wire? Answer in units of Ω. Would you just use the equation R = PL /a?

*March 8, 2016 by Jeff*

**Physics**

Please how do i get an answer to this answer that goes like this a wire of length 5.0m and diameter 2.0cm extends by 0.25mm when a force of 50n was used on its end. Calculate (i) stress (ii) strain in the wire (pi=3.142)

*April 9, 2016 by Manuel*

**physics**

Consider two copper wires with the same cross-sectional area. Wire A is twice as long as wire B. How do the resistivities and resistances of the two wires compare? CHECK ALL THAT APPLY Wire A and wire B have the same resistance. Wire A has twice the resistivity of wire B. Wire...

*February 7, 2014 by Anonymous*

**physics**

A 570-turn solenoid is 19cm long. The current in it is 32A . A 2.0cm -long straight wire cuts through the center of the solenoid, along a diameter. This wire carries a 27A current downward (and is connected by other wires that don't concern us). What is the force on this wire ...

*April 8, 2013 by bud*