
If the circle and square have the same area, then magnetizing force at the center of the coil as a result of current flowing through the coil will be in the ratio

Consider two single turn coils labeled 1 and 2 that are positioned close to each other. The switch S has been open for a long time. If the switch is now closed and the current through coil 1 is in the direction shown and increasing, which of the following statements is true? a...

Consider two single turn coils labeled 1 and 2 that are positioned close to each other. The switch S has been open for a long time. If the switch is now closed and the current through coil 1 is in the direction shown and increasing, which of the following statements is true? a...

Consider two single turn coils labeled 1 and 2 that are positioned close to each other. The switch S has been open for a long time. If the switch is now closed and the current through coil 1 is in the direction shown and increasing, which of the following statements is true? a...

An eight turn coil encloses an elliptical area having a major axis of 40.0 cm and a minor axis of 30.0 cm. The coil lies in the plane of the screen and has a 6.10 A current flowing clockwise around it. If the coil is in a uniform magnetic field of 2.07 104 T directed toward ...


An eight turn coil encloses an elliptical area having a major axis of 40.0 cm and a minor axis of 30.0 cm. The coil lies in the plane of the screen and has a 6.10 A current flowing clockwise around it. If the coil is in a uniform magnetic field of 2.07 104 T directed toward ...

sUPPOSE YOU HAVE A square coil and a triangular coil each have sides of length L. The triangular coil has twice as many turns as the square coil. If a the same current is sent through each coil, when the coils are placed in the same uniform magnetic field making an angle of 30...

For a long straight wire, carrying a current of 20 A. A rectangular coil 5 x 10 cm2 is 2 cm apart. The coil carries a current of 5 A. a) determining the force acting on each segment of the rectangular coil. b) What is the net force on the coil?

You have a wire of length L = 2.1 m for making a square coil of a dc motor. The current in the coil is I = 1.8 A, and the magnetic field of the motor has a magnitude of B = 0.32 T. Find the maximum torque exerted on the coil when the wire is used to make (a) a singleturn ...

A circular coil with a radius of 25 cm has 20 turns. The coil is oriented perpendicularly to a magnetic field whose initial magnitude is 3.2 T. Suddenly, the magnetic field vanishes in 0.4 s. a. What is the initial magnetic flux in the coil? b. What is the induced emf in the ...

A square coil with 30 turns has sides that are 18 cm long. When it is placed in a 0.31T magnetic field, a maximum torque of 0.60 N⋅m is exerted on the coil. What is the current in the coil?

A circular wire coil consists of 100 turns and is wound tightly around a very long iron cylinder with a radius of 2.5 cm and a relative permeability of 2200. The loop has a current of 7.5A in it. Determine the magnetic field strength produced by the coil (a) at the center of ...

A rectangular coil 60mm × 40mm with 25 turns is positioned with its longer sides parallel to a long straight vertical wire carrying a current of 6.8A. The coil is placed so that its long sides and the vertical wire are in the same vertical plane, with the wire 40mm away from ...

1. A closed magnetic circuit of cast steel contains a 6cm long path of cross sectional area 1cm square and a 2cm part of cross sectional area of 0.5cm square. A coil of 200 turns is wound around the 6cm length of the circuit and a current of 0.4ampere flows. Determine the flux...

#6 (6 points possible) The demonstration in LS6.U5 uses a Helmholtz coil, which is a pair of wire coils along a common axis that creates a somewhat uniform magnetic field at the center. To achieve a uniform field, the coil separation is equal to the coil radius. The Helmholtz ...


A long solenoid has 1400 turns per meter of length, and it carries a current of 2.0 A. A small circular coil of wire is placed inside the solenoid with the normal to the coil oriented at an angle of 90.0˚ with respect to the axis of the solenoid. The coil consists of 46 ...

a coil having 1000 turns and a length of 3.14cm carries a current of 5A. calculate the magnetomotive force and the magnetizing force.

coil having 1000 turns and a length of 3.14cm carries a current of 5A. calculate the magnetomotive force and the magnetizing force

a coil having 1000 turns and a length of 3.14cm carries a current of 5A. calculate the magnetomotive force and the magnetizing force.

A cirular coil of 19 turns and radius 10.2cm surrounds a long solenoid of radius 2.6cm and 1.00x103 turns per meter. The two are oriented so that the axis of the coil and the axis of the solenoid are parallel and the center of the coil is at the center of the solenoid. If the ...

A flat circular coil with 192 turns, a radius of 2.35 x 102 m, and a resistance of 0.359 Ù is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of ÄB/Ät = 0.696 ...

A solenoid has a crosssectional area of 2.60 104 m2, consists of 600 turns per meter, and carries a current of 0.7 A. A 10 turn coil is wrapped tightly around the circumference of the solenoid. The ends of the coil are connected to a 0.8 resistor. Suddenly, a switch is ...

A solenoid has a crosssectional area of 2.60 104 m2, consists of 600 turns per meter, and carries a current of 0.7 A. A 10 turn coil is wrapped tightly around the circumference of the solenoid. The ends of the coil are connected to a 0.8 resistor. Suddenly, a switch is ...

A solenoid has a crosssectional area of 2.60 104 m2, consists of 600 turns per meter, and carries a current of 0.7 A. A 10 turn coil is wrapped tightly around the circumference of the solenoid. The ends of the coil are connected to a 0.8 resistor. Suddenly, a switch is ...

Which of these cannot increase the strength of an electromagnet? a. making the loops smaller in the coil b. placing an iron bar in the coil c. winding more loops in the coil d. increasing the current in the coil


A magnetic field is perpendicular to the plane of a singleturn circular coil. The magnitude of the field is changing, so that an emf of 0.93 V and a current of 2.7 A are induced in the coil. The wire is the reformed into a singleturn square coil, which is used in the same ...

The voltage (in volts) induced in a coil of wire is v = (2t + 1)^0.5. The current in the coil is initially 0.3 amps, and the inductance is 5H. What is the equation for the current in the coil?

The voltage (in volts) induced in a coil of wire is v = (2t + 1)^0.5. The current in the coil is initially 0.3 amps, and the inductance is 5H. What is the equation for the current in the coil?

The voltage (in volts) induced in a coil of wire is v = (2t + 1)0.5. The current in the coil is initially 0.3 amps, and the inductance is 5H. What is the equation for the current in the coil?

A flat circular coil with 193 turns, a radius of 5.50 x 102 m, and a resistance of 0.241 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of ΔB/&#...

A flat circular coil with 113 turns, a radius of 3.64 102 m, and a resistance of 0.524 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of ΔB/Δ...

A flat circular coil with 97 turns, a radius of 4.04 102 m, and a resistance of 0.528 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of ΔB/Δt...

There are four coils of wire being used as electromagnets. They all have the same size and are made up of the same material but have a different number of loops. Which coil will produce a magnetic field with the maximum strength when the same amount of current passes through ...

A magnetic needle is disposed inside a horizontal coil. In the abscence of any electric current the needle is observed to get oriented in a direction perpendicular to the x'x of the coil. a) what is the direction of the terrestrial magnetic field. b) A current I is allowed in ...

A cirular coil of 27 turns and radius 15.0cm surrounds a long solenoid of radius 4.7cm and 1.00x103 turns per meter. The two are oriented so that the axis of the coil and the axis of the solenoid are parallel and the center of the coil is at the center of the solenoid. The ...


The potential difference measured across a coil is 20 V when a direct current of 2 A is passed through it. With an alternating current of 2 A at 40 Hz, the p.d. across the coil is 140 V. If the coil is connected to a 230 V, 50 Hz supply, calculate: (a) the current; (b) the ...

A circular conducting coil with radius 3.40 cm is placed in a uniform magnetic field of 1.090 T with the plane of the coil perpendicular to the magnetic field. The coil is rotated 180° about the axis in 0.222 s. (a) What is the average induced emf in the coil during this ...

A magnetic field is perpendicular to the plane of a single turn circular coil. The magnitude of the field is changing so that the emf of 0.80 V and a current of 3.2 A are induced in the coil. The wire is then reformed into a single turn square coil, which is used in the same ...

A student thrusts a 0,20T magnet with a cross sectional area of 2.0 cm^2 into a coil of 400 turns in 0,50s. The coil has a resistance of 30 ohms and it is connected in series with a moving coil meter having a resistantace of 170 ohms. What is the average velocity and the current?

A student thrusts a 0,20T magnet with a cross sectional area of 2.0 cm^2 into a coil of 400 turns in 0,50s. The coil has a resistance of 30 ohms and it is connected in series with a moving coil meter having a resistantace of 170 ohms. What is the average velocity and the current?

A flat circular coil with 103 turns, a radius of 3.96 102 m, and a resistance of 0.456 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of ΔB/Δ...

A flat circular coil with 103 turns, a radius of 3.96 102 m, and a resistance of 0.456 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of ΔB/Δ...

I'm not sure how to deal with this problem (we're just starting the unit)... I need to find the average voltage induced into a 100 turn coil by a vertical wire when the wire's current drops from 602A to 0A in 0.01 seconds. ...if the coil was drawn as a circle on paper, the ...

A 0.35 m2 coil with 50 turns rotates at 5 radians per sec2 in a magnetic field of 0.6 Tesla. What is the value of the rms current in the coil if the coil has the resistance of 3.3 Ù? Have no idea how to do this...

A transformer has 120 V across the 100turn primary coil and has 5 turns in the secondary coil. If the current in the primary coil is 0.1 A, how much power is dissipated in the secondary coil?


A 0.35 m2 coil with 50 turns rotates at 5 radians per sec2 in a magnetic field of 0.6 Tesla. What is the value of the rms current in the coil if the coil has the resistance of 3.3 Ω?

A 0.35 m2 coil with 50 turns rotates at 5 radians per sec2 in a magnetic field of 0.6 Tesla. What is the value of the rms current in the coil if the coil has the resistance of 3.3 Ù? Can you also show me how you got the answer? Thanks so much

A magnetic field is perpendicular to the plane of a singleturn circular coil. The magnitude of the field is changing, so that an emf of 0.63 V and a current of 2.7 A are induced in the coil. The wire is then reformed into a singleturn square coil, which is used in the same ...

A magnetic field is perpendicular to the plane of a singleturn circular coil. The magnitude of the field is changing, so that an emf of 0.74 V and a current of 3.8 A are induced in the coil. The wire is then reformed into a singleturn square coil, which is used in the same ...

A rectangular coil 0.065 m by 0.080 m is positioned so that its crosssectional area is perpendicular to the direction of a magnetic field. The coil has 66 turns and a total resistance of 7.6 Ω and the field decreases at a rate of 2.5 T/s. What is the magnitude of the ...

A coil of wire with 200 circular turns of radius of 3 cm is in a uniform magnetic field along the axis of the coil. the coil has R=40 ohms. At what rate, in Teslas per second, must the magnetic field be changing to induce a current of .150 A in the coil? I don't know if I am ...

A magnetic field is perpendicular to the plane of a singleturn circular coil. The magnitude of the field is changing, so that an emf of 0.65 V and a current of 3.4 A are induced in the coil. The wire is the reformed into a singleturn square coil, which is used in the same ...

A coil is wrapped with 200 turns of wire on the perimeter of a square frame of sides 20.5 cm. Each turn has the same area, equal to that of the frame, and the total resistance of the coil is 2.01 Ω. A uniform magnetic field is turned on perpendicular to the plane of the ...

A magnetic field is perpendicular to the plane of a singleturn circular coil. The magnitude of the field is changing, so that an emf of 0.93 V and a current of 2.7 A are induced in the coil. The wire is the reformed into a singleturn square coil, which is used in the same ...

A magnetic field is perpendicular to the plane of a singleturn circular coil. The magnitude of the field is changing, so that an emf of 0.98 V and a current of 2.1 A are induced in the coil. The wire is then reformed into a singleturn square coil, which is used in the same ...


The coil in the figure below contains 425 turns and has an area per turn of 3.00 103 m2. The magnetic field is 0.21 T, and the current in the coil is 0.27 A. A brake shoe is pressed perpendicularly against the shaft to keep the coil from turning. The coefficient of static ...

The coil in the figure below contains 425 turns and has an area per turn of 3.00 103 m2. The magnetic field is 0.21 T, and the current in the coil is 0.27 A. A brake shoe is pressed perpendicularly against the shaft to keep the coil from turning. The coefficient of static ...

can someone please explain this aim: To investigate how the force acting on a bar magnet placed in a current carrying coil is related to the coil??? what is the force called?

A current I=2 Amperes flows in a circular single loop coil of radius R=10 cm. (a) Evaluate the magnitude of the magnetic field (in Tesla) at a point P on the axis of the coil, and a distance z=5 cm away from the plane of the coil itself

A coil is made up of 19 square loops with the sides equal to 5.3 cm. The coil is placed in a uniform 350 mT magnetic field with the axis of the coil parallel to the magnetic field. If the field reverses direction in 0.17 seconds, what is in volts, the average emf induced in ...

A soldering iron uses an electric current in a wire to heat the tip. A transformer with 100 turns on the secondary coil provides 54 W at an rms voltage of 26 V. a) How many turns are in the primary coil? b) What is the current in the primary coil?

A 35 turn coil of radius 4.9 cm rotates in a uniform magnetic field having a magnitude of 0.53 T. If the coil carries a current of 20 mA, find the magnitude of the maximum torque exerted on the coil.

The coil of the ac generator rotates at a frequency of f =60.0 Hz and develops an emf of 120 V (rms). The coil has an area of A = 3.0 x 10 3 m 2 and consists of N = 500 turns. a. Find the magnitude of the magnetic field in which the coil rotates. b. If the total resistance of...

A rectangular coil of dimensions 20cm by 15cm lies with its plane parallel to a magnetic field of 0.5W/m^2. The coil, carrying a current of 10A experiences a torque of 4.5Nm in the field. How many loops has the coil?

1)An increase in the velocity of wire moving perpendicular through a magnetic field increases the induced EMF. true. confused me 2)There are four coils of wire being used as electromagnets. They all have the same size and are made up of the same material but have a different ...


During a 74ms interval, a change in the current in a primary coil occurs. This change leads to the appearance of a 4.6mA current in a nearby secondary coil. The secondary coil is part of a circuit in which the resistance is 12 Ù. The mutual inductance between the two coils ...

A 47.5turn circular coil of radius 5.15 cm can be oriented in any direction in a uniform magnetic field having a magnitude of 0.490 T. If the coil carries a current of 22.9 mA, find the magnitude of the maximum possible torque exerted on the coil. _______N*m?

The maximum torque experienced by a coil in a 0.90 T magnetic field is 8.4 104 N·m. The coil is circular and consists of only one turn. The current in the coil is 3.9 A. What is the length of the wire from which the coil is made? Please tell me if I am going in the right ...

A generator has a square coil consisting of 700 turns. The coil rotates at 78 rad/s in a 0.21T magnetic field. The peak output of the generator is 120.00 V. What is the length of one side of the coil?

A generator has a square coil consisting of 700 turns. The coil rotates at 78 rad/s in a 0.21T magnetic field. The peak output of the generator is 120.00 V. What is the length of one side of the coil?

A generator has a square coil consisting of 700 turns. The coil rotates at 78 rad/s in a 0.21T magnetic field. The peak output of the generator is 120.00 V. What is the length of one side of the coil?

Q:A 50 turns coil in a generator has an area 500cm(square)rotates in magnetic field with B=1.76 w/m(square), how fast must the coil be rotated in order to generate a maximum voltage of 220 volt? PLZ EXPLAIN WITH DATA!

A strong electromagnet produces a uniform field of 1.31 T over a crosssectional area of 0.195 m2. A coil having 245 turns with a total resistance of 16 is placed around the electro magnet, and the current in the electromagnet is turned off, reaching zero in 19.3 ms. What ...

Current flows through the wire coil in the direction shown by the arrows. What is the direction of the magnetic field inside the coil? (Image shows arrow pointing up into the right side of the coil and pointing down at the left side of the coil) a. upward b. downward c. toward...

The resistance of a coil copper wire at 20 degree celsius is 2.21 ohms. After a current of 10 amperes has been flowing in wire for two hours, the resistance of the coil was found o be 2.59 ohms. What is the temperature rise?


A soldering iron uses an electric current in a wire to heat the tip. A transformer with 100 turns on the secondary coil provides 54 W at an rms voltage of 26 V. a) How many turns are in the primary coil? b) What is the current in the primary coil?

1. A rectangular coil 0.065 m by 0.080 m is positioned so that its crosssectional area is perpendicular to the direction of a magnetic field. The coil has 66 turns and a total resistance of 7.6 Ω and the field decreases at a rate of 2.5 T/s. What is the magnitude of the ...

An electric heating coil is immersed in a beaker of water and turned on. A current of 3.50 A floured through the coil. After the water starts to boil, it is found that 60.0 g of water vaporizes in 4.00 minutes. What is the resistance of the coil? (Iv = 540 cal/g)

An electric heating coil is immersed in a beaker of water and turned on. A current of 3.50 A floured through the coil. After the water starts to boil, it is found that 60.0 g of water vaporizes in 4.00 minutes. What is the resistance of the coil? (Iv = 540 cal/g)

A dc electric motor found in the lab was being examined by a student. It was connected to a power supply and it was not attached to any load. (a) The student stated, ‘when the motor is switched on, the electrical energy input should cause the motor to start rotating, and the...

A generator uses a coil that has 280 turns and a 0.45T magnetic field. The frequency of this generator is 60.0 Hz, and its emf has an rms value of 120 V. Assuming that each turn of the coil is a square (an approximation), determine the length of the wire from which the coil ...

A 500 turn solenoid with a length of 20 cm and a radius of 1.5 cm carries a current of 2.0 A. A second coil of four turns is wrapped tightly about this solenoid so that it can be considered to have the same radius as the solenoid. Find the following when the current in the ...

Winter is coming, so I want to make a 1500 W heating coil which will plug into a 120 V wall outlet. The coil will have a cross sectional area of 0.01 cm2 and a length (when fully unwound) of 5 m. Determine the resistivity of the coil required, in Ωcm:

A solenoid is wound with 290 turns per centimeter. An outer layer of insulated wire with 200 turns per centimeter is wound over the solenoid's first layer of wire. When the solenoid is operating, the inner coil carries a current of 10 A and the outer coil carries a current of ...

1. A rectangular coil 0.065 m by 0.080 m is positioned so that its crosssectional area is perpendicular to the direction of a magnetic field. The coil has 66 turns and a total resistance of 7.6 Ω and the field decreases at a rate of 2.5 T/s. What is the magnitude of the ...


A flat circular coil with 193 turns, a radius of 5.50 x 102 m, and a resistance of 0.241 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of ΔB/&#...

A flat circular coil with 193 turns, a radius of 5.50 x 102 m, and a resistance of 0.241 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of ΔB/&#...

Need help on which formulas I use to solve problems? A coil of wire with 200 circular turns of radius 3.00 cm is in a uniform magnetic field along the axis of the coil. The coil has R = 40.0 ohms. At what rate, in teslas per second, must the magnetic field be changing to ...

A 500 turn solenoid with a length of 20 cm and a radius of 1.5 cm carries a current of 2.0 A. A second coil of four turns is wrapped tightly about this solenoid so that it can be considered to have the same radius as the solenoid. Find the following when the current in the ...

A 500 turn solenoid with a length of 20 cm and a radius of 1.5 cm carries a current of 2.0 A. A second coil of four turns is wrapped tightly about this solenoid so that it can be considered to have the same radius as the solenoid. Find the following when the current in the ...

calculate the current in the secondary coil when the current in the primary coil is 0.50 A. there are 200 turns in the primary coil and 3000 turns on the secondary. the input voltage is 55 v

A transformer has 25 turns in the primary coil and 200 turns in the secondary coil. If 12 V is connected to the primary coil and a 20Ω device is connected to the secondary coil, calculate the current in Amperes passing through the device.

A transformer has 25 turns in the primary coil and 200 turns in the secondary coil. If 12 V is connected to the primary coil and a 20Ù device is connected to the secondary coil, calculate the current in Amperes passing through the device

A stepup transformer used in a car has a potential difference of 10 V across the primary coil with 12 turns. What is the current in the secondary coil of resistance 2.5 Ω if the number of turns in the secondary coil is 54 turns?

The primary coil of a transformer is connected to a standard wall socket. A resistance R is connected across the secondary coil. The resistance across the secondary coil is increased. What happens to the current in the primary coil, and what happens to the power being supplied...


To monitor the breathing of a hospital patient, a thin belt is girded around the patient's chest. The belt is a 200turn coil. When the patient inhales, the area encircled by the coil increases by 45.0 cm2. The magnitude of the Earth's magnetic field is 50.0 μT and makes ...

a uniform magnetic field of strength 0.5T is directed at an angle of 30degree to the plane of 100turns regular copper coil of lenght 0.04m and width 0.05mm. the diameter of the copper wire which makes up a coil is 1mm and the resistivity of copper is 0.000000017ohms meter. the...

A transformer has 25 turns in the primary coil and 200 turns in the secondary coil. If 12 V is connected to the primary coil and a 20Ù device is connected to the secondary coil, calculate the current in Amperes passing through the device.

You have a coil with 20 loops inside a magnetic field generator that is temporarily generating a field that has a rate of change of 0.25. The other end of this coil is wrapped around a core with 15 turns a second coil wrapped around the same coil has to produce an output ...

To monitor the breathing of a hospital patient, a thin belt is girded around the patient's chest . The belt is a 215turn coil. When the patient inhales, the area encircled by the coil increases by 41.0 cm2. The magnitude of Earth's magnetic field is 50.0 µT and makes an ...
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