Im doing my resistance of a wire coursework. If a wire is longer why does the voltage increase and the current decrease?
9,787 results
physics
Consider two copper wires with the same crosssectional 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

physics
A copper wire has a resistance of 0.425 at 20.0°C, and an iron wire has a resistance of 0.455 at the same temperature. At what temperature are their resistances equal?

math
Half Robert’s piece of wire is equal to 2/3 of Maria’s wire. The total length of their wires is 10 feet. How much longer is Robert’s wire than Maria’s?

Physics!! Help!!!!!
A wire of length L and crosssectional area A has resistance R. What will be the resistance R_stretched of the wire if it is stretched to twice its original length? Assume that the density and resistivity of the material do not change when the wire is

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?

physics
The filament in an incandescent light bulb is made from tungsten (resistivity 5.6 x 108 Ù·m). The light bulb is plugged into a 120V outlet and draws a current of 2.36 A. If the radius of the tungsten wire is 0.00464 mm, how long must the wire be?

physics, university
A 50.0g sample of a conducting material is all that is available. The resistivity of the material is measured to be 11 x 108 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

AP Physics
A certain length of wire has a resistance of 21 ohms. This wire is melted down and from the same volume of material a new wire is formed that is three times longer than the original wire. What is the resistance of a new wire? ***PLEASE SHOW ALL WORK!!!

physics
a piece of wire has a resistance of R , it is cut into three pieces of equal length,and the pieces are twisted together parallel to each other. what is the resistance of the resulting wire in terms of R

Physics
1. A force of 40N at the end of a wire of length 4m and diameter 2mm process and extension of 0.24mm. Calculate; (a) stress on the wire (b) strain in the wire (c) Young's Modulous for the material of the wire (π=3.14)

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 ×

physics
A potentiometer circuit consists of a battery of e.m.f 5v and internal resistance 10 ohms connected in series with a 30 ohms resistor and a potentiometer wire AB of length 1m and resistance 20 ohms calculate:the total resistance of the circiuit ,the

physics
A force of 40N is applied at the end of a wire 4m long and produces an extension of 0.24mm. If the diameter of the wire is 2.00mm calculate the stress on the wire and strain in the wire. With full workings please

Check my answers Ms. Sue
A student made an electromagnet using a battery, electrical tape, and metal wire. Which of the following actions will NOT increase the magnetic field that is being produced? (1 point) • changing the type of wire that has low resistance • making coils

pyhsical science
A wire of uniform crosssection has a resistance of R Ω. What would be the resistance of a similar wire, made of the same material, but twice as long and of twice the diameter?

Physics resistance question
A piece of copper wire of resistance R is cut into 10 equal lengths. These parts are connected in parallel. How does the joint resistance of the parallel combination compare with the original resistance of the single wire?

vectors
A steel wire 40 m long is suspended between two fixed points 20 m apart. A force of 375 N pulls the wire down at a point 15 m from one end of the wire. State the tension in each part of the wire. Texbook answer: 375N, 0N

physics
A wire of initial length L0 and radius r0 has a measured resistance of 2.5 . The wire is drawn under tensile stress to a new uniform radius of r = 0.45r0. What is the new resistance of the wire?

science
If a wire of resistance R is melted and recast to half of its length then the new resistance of the wire will be

Physics
(1) 45 micro coulombs of charge is passed through a wire in 35 seconds. How many electrons does this represent? What is the current in the wire? (2) A piece of copper wire has a resistance of 5 Ohms at 20 degrees celsius. If another piece of copper wire at

Physics Resistance
A piece of wire of resistance, R and uniform cross sectional area, A is cut into four equal parts and bundled together to form a thicker wire. The resistance of the bundled wire is: A 16R B 1/4R C 4R D 1/16R It's either 16 or 1/16 im not sureee. So I need

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

physics
A 50.0g sample of a conducting material is all that is available. The resistivity of the material is measured to be 11~ 108 ƒ¶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

physics
A piece of copper wire has a resistance per unit length of 6.45*103 /m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.140 m. The ends of the wire are connected to a 12.0 V battery. Find the magnetic field strength at the

Physics
A wire with a circular cross section and a resistance R is lengthened to 3.77 times its original length by pulling it through a small hole. After being pulled through the hole, the total volume of the wire is unchanged. Find the resistance of the wire

math
In physics, Ohm's law says that current through a wire, I, is directly proportional to voltage, V, and inversely proportional to resistance, R: I=V/R. It's also true that resistance is directly proportional to the length of the wire. We have a piece of

physics
As part of a class project you are given 0.900 g of nichrome and asked to fabricate a wire with uniform crosssection. You use up 95% of the nichrome and make a wire with a resistance of 0.840 Ω. The resistivity of nichrome is 1.00 106 Ω · m and its

physics
A certain copper wire has a resistance of 12.0 \Omega.At what point along its length must the wire be cut so that the resistance of one piece is 5.0 times the resistance of the other?

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 10.6E8/1.59E8 but am not getting correct answer?

Physics
Two current carrying wires cross at right angles as indicated in the figure. If the wires are not restrained, what statement best describes the motion of the wires? Hint: To help you visualize the situation, draw first the magnetic field that Wire 1 makes

Physics
A long straight horizontal segment of wire with 0.060 m traverses a west magnetic field with 2.0 T. If a south current with 4.0 A flows through the wire, which one of the following statements concerning the effect of the magnetic force on the wire is true.

Physics
Two cylindrical copper wires have the same mass and are at the same temperature. Wire A is twice as long as wire B. The resistance of wire A is related to that of wire B by a) RA = RB/4 b) RA = RB/2 c) RA = RB d) RA = 2RB e) RA = 4RB

physics
a wire has a resistance of 6 ohm it is stretched out to a new length which is three times its original length what is the resistance of the longer wire?assume uniform diameter.resistivity and density are constant

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? (µm)

Physics
A piece of copper wire is formed into a single circular loop of radius 13 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.70 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 102 /m.

Physics
A wire of crosssectional area 5.00x10^6 m^2 has a resistance of 1.75 ohm. what is the resistance of a wire of the same material and length as the first wire, but with a crosssectional area of 8.75x10^6 m^2? I really want to understand what to do here,

Physics
A copper wire has a resistance of 24 Ω at 20°C. An aluminum wire has three times the length and twice the radius of the copper wire. The resistivity of copper is 0.6 times that of aluminum. Both Al and Cu have temperature coefficients of resistivity of

algebra
A three quarter inch wire has 12 ohms resistance. How much resistance has the same length of halfinch wire, if resistance varies inversely as the square of the diameter?

Physics
A wire of 5.0m and diameter 2.0mm,extends by 0.25mm when a force of 50N was stretch it from it's end calculate a.the stress on the wire. b.the strain in the wire. c.the young's modulus of elasticity of the wire

Physics
Two current carrying wires cross at right angles (like a + sign). Wire 1 has current directed horizontally to the left. Wire 2 has current directed vertically up. If the wires are not restrained, what statement best describes the motion of the wires? A)

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?

physics
A wire has a resistance of 27.2 ohms. It is melted down, and from the same volume of metal a new wire is made that is 3 times longer than the original wire. What is the resistance of the new wire? Resistance and length of wire are proportional, but what I

College Physics
A wire P has resistance R. If the wire is stretched and its length is increased by 10%, what would be the percentage change in its resistance? (Assume the density of the wire remains constant) A)  10% B) 0 % C) 10% D) 20% My thoughts: Since resistance is

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

science
The resistance of 10m long wire is 10 . Its length is increased uniformly by 25% by stretching the wire uniformly. The resistance of wire will change to (approximately) (A) 12.5 (B) 14.5 (C) 15.6 (D) 16.6

Ap physics b
A piece of copper wire is formed into a single circular loop of radius 11 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.65 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 102 /m.

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 12 108 · 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

Physics
A piece of copper wire has a resistance per unit length of 5.50 x 10^3 Ω/m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.200 m. The ends of the wire are connected to a 12.0V battery. Find the magnetic field strength at

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.

Physics
Suppose that you wish to fabricate a uniform wire out of 1 g of copper. (Resistivity = 1.72*10^8 Ohmm, density = 8.94*10^3kg/m^3). If the wire is to have a resistance of R = 0.5 ohm and all of the copper is to be used, how long is the wire? a. 1765 m b.

Circuits, Kirchoff
A circuit can be used to measure the resistance of a platinum resistance thermometer (PRT). AB is a uniform resistance wire of length 1.0mandCisa sliding contact on this wire. A standard resistor R is included in the circuit. The position of C is adjusted

physics
A potential difference of 12 V produces a current of 0.90 A in a piece of copper wire. What is the resistance of the wire?

science
Im doing my resistance of a wire coursework. If a wire is longer why does the voltage increase and the current decrease?

Physics
Two cylindrical copper wires have the same mass and are at the same temperature. Wire A is twice as long as wire B. The resistance of wire A is related to that of wire B by : a) RA = RB/4 b) RA = RB/2 c) RA = RB d) RA = 2RB e) RA = 4RB

physics
One mile of copper wire has a resistance of 13 Ω. Using the wire to electrically connect two terminals that are half a mile apart, rank the following situations in order of increasing resistance. I. Use the full length of wire. II. Cut the wire in half

physics
The magnetic field in a loudspeaker is 0.18 T. The wire consists of 150 turns wound on a 1.4 cm diameter cylindrical form. The resistance of the wire is 8.0 . Find the force exerted on the wire when 15 V is placed across the wire.

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

physics
A wire has a resistance of R. What will the wire's resistance be if it is stretched to four times its original length without changing the volume of the wire? (Express in terms of R.) R=V/I; 4R=V/I; R=V/(I/4) I think this is right? help please.

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

physics Important please
A metal wire has a resistance of 8.00Ω at a temperature of 20C. If the same wire has a resistance of 8.40Ω at 70C, what is the resistance of this wire in ohms when its temperature is −10C?

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 1.7e8(ohm)(m) at 20 degrees celsius. The temperature coefficient for the wire is 0.0038(degrees celsius)^1. Calculate the resistance of the wire

physics
A potential difference of 2.0 V is applied across a wire of cross sectional area 2.5 mm2. The current which passes through the wire is 3.2 × 103 A. What is the resistance of the wire?

Physic please help!
A piece of copper wire is formed into a single circular loop of radius 13 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.70 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 102 /m.

Math
The electrical resistance of a wire is directly proportional to its length. If a 3foot long wire has a resistance of 1 ohm(s), find the resistance of a 9foot long wire. What is the resistance?

Physics  Electricity
Can you please check my answers. 1) What carries energy through wire? electrons 2) What happens to some of the energy when it moves through the wire? becomes lost due to the movement of energy requiring some kinetic energy 3) If a resistance is large, why

Physics
A nichrome wire of diameter 5mm and length 5m has resistivity of 10^4 ohm meter. If wire is compressed to double it's diameter. Find the resistance in its new form. Also find the resistance of the wire originally ?

physics
A length of wire has a radius of 3.00 ~ 103 m and a resistance of 0.200 ƒ¶. When the potential difference across the wire is 10.0 V, the electron drift speed is found to be 2.98 ~ 104 m/s. On the basis of these data, calculate the density of free

university, physics.
A length of wire has a radius of 3.00 ~ 103 m and a resistance of 0.200 ƒ¶. When the potential difference across the wire is 10.0 V, the electron drift speed is found to be 2.98 ~ 104 m/s. On the basis of these data, calculate the density of free

Physics. Free electron density, please help!
A length of wire has a radius of 3.00 × 103 m and a resistance of 0.200 Ω. When the potential difference across the wire is 10.0 V, the electron drift speed is found to be 2.98 × 104 m/s. On the basis of these data, calculate the density of free

Physics
A 2.00 cm x 2.00 cm square loop of wire with resistance 1.30×10^−2 Ohms is parallel to a long straight wire. The near edge of the loop is 1.00 cm from the wire. The current in the wire is increasing at the rate of 110 A/s. What is the current in the

physics
(1).The resistance of wire is giving by the relation Rt=Ro(1 alpha t Bt^2) T is the temperature alpha & Bt^2(beta) are constant R=Resistance of the wire in ohms Assuming the resistance of plantimum wire at 0°c,100°c,444.6°c and found to be 4.5,6.5 and

Physics repost
I know I have posted this question before but I have tried everything under the sun to no avail. Please help a clueless student!!!! A piece of copper wire is formed into a single circular loop of radius 13 cm. A magnetic field is oriented parallel to the

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 ratio power delivered to wire A to the

Electricity help needed please
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

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

physics, university
A length of wire has a radius of 3.00 x 103 m and a resistance of 0.200 ohms. When the potential difference across the wire is 10.0 volts, the electron drift speed is found to be 2.98 x104 m/s. On the basis of these data, calculate the density of free

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 =

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

PHYSICS
A wire of initial length Lo and radius rO has a measured resistance of 1.0 ohm. the wire is drawn under tensil stress and to a new uniform radius of 0.25rO. what is the new resistance of the wire? i know the answer is 256 ohm but i have no clue how to get

Physics
If a wire of resistance R is stretched uniformly to 2.8 times its initial length, by what factor does the power dissipated in the wire change, assuming it remains hooked up to the same voltage source? Assume the wire's volume and density remain constant.

physics/electrical circuits
a wire has a resistance of 1 ohm if the length is increased four times and the area is double the original, find the new resistance of the wire.

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

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

Math word problem
I know the answer, but is there a formula to show work? Amy had a piece of wire 96 inches long. She cut the wire into 3 pieces. The second piece was 6 inches longer than the first piece. The third piece is 9 inches longer than the second. What was the

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 ratio power delivered to wire A to the

Physics
If a Wire Resistance is 10 ohm at 0 DegC and the same wire Resistance becomes 15 ohm at temperature 100 DegC, then at what temperature the wire Resistance will be 30 ohm? Temperature coefficient of the wire material is 0.0047.

physics
A steel (Young's modulus 2.0 x 1011 N/m2) wire is strung between two supports attached to a ceiling. Initially, there is no tension in the wire when it is horizontal. A 88N picture is then hung from the center of the wire, as the drawing illustrates, so

Physics
A steel (Young's modulus 2.0 x 1011 N/m2) wire is strung between two supports attached to a ceiling. Initially, there is no tension in the wire when it is horizontal. A 98N picture is then hung from the center of the wire, as the drawing illustrates, so

Physics
For voltage variation with length, in using a slide meter, the wire resistance varies linearly with length as Rx = resistivity/Area. Since the voltage and resistance are related with ohm's law, Vx= iRx, the current is the same alog all pts. along the slide

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

physics
A long wire is wrapped around a length of pipe until the wire is shaped like a spring. This arrangement of wire is called a a. Solenoid b. Toroid c. Current loop d. Straight wire e. Flat coil

physics
A wire with circular crosssection of radius 1mm carries a current of The speed of the carriers inside the wire is What is the current density in the wire? the charge density in the wire and how long it takes for an Avogadro’s number of charges to emerge

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

Physics
The filament in an incandescent light bulb is made from tungsten (resistivity 5.6 x 108 Ù·m). The light bulb is plugged into a 120V outlet and draws a current of 2.36 A. If the radius of the tungsten wire is 0.00464 mm, how long must the wire be?

Physics
A length of copper wire is shaped into a single circular loop of circumference 63 cm, similar to that shown in the picture below. A magnetic field of strength 0.50 T is parallel to the normal of the loop. The copper wire has a resistance of 2.5 x 102 Ω.

help with physics
A gold wire and a silver wire have the same dimensions. At what temperature will the silver wire have the same resistance that the gold wire has at 20°C?

Physics
A gold wire and a silver wire have the same dimensions. At what temperature will the silver wire have the same resistance that the gold wire has at 20°C?

physics
A potential difference of 12 V produces a current of 0.90 A in a piece of copper wire. What is the resistance of the wire?

Science
If the current in a wire is at 0.5 A and the voltage is measured 100 volts, what is the resistance in the wire?

Physics
What is the resistivity of a cylinderical material wire whose 1.0m lenght has a resistance of 2.0 ohm? The radius of the wire is 1.0mm