358675
In the following figure,the magnet is moved towards the coil with a speed \(v\) and induced emf is \(\varepsilon\). If magnet and coil recede away from one another each moving with speed \(v\), the induced emf in the coil will be
Lenz's law governs the direction of induced current in electromagnetic induction.
PHXII06:ELECTROMAGNETIC INDUCTION
358677
A bar magnet is allowed to fall vertically through a copper coil placed in a horizontal plane. The magnet falls with a net acceleration
1 \( = g\)
2 zero
3 \( < g\)
4 \( > g\)
Explanation:
When a bar magnet is allowed to fall through a conductor, e.g., copper coil, the magnetic flux linked with coil changes continuosly and hence eddy currents are induced in it which, according to Lenz's law will be produced in such a direction so as to oppose the change in magnetic flux and hence produce damping effect. Therefore, the net acceleration of magnet will be less than acceleration due to gravity.
KCET - 2017
PHXII06:ELECTROMAGNETIC INDUCTION
358678
If a resistance less rod is moving with constant velocity \(v\) in a constant magnetic field. Then direction of current \(I_{1}\) and \(I_{2}\) in resistance \(R_{1}\) and \(R_{2}\) respectively is :
The magnetic flux is decreasing in the loop on the left and increasing in the loop on the right. \(\therefore\) Using Lenz's law, the direction of current \(I_{1}\) in \(R_{1}\) is clockwise and the direction of current \(I_{2}\) in \(R_{2}\) is anticlockwise.
JEE - 2021
PHXII06:ELECTROMAGNETIC INDUCTION
358679
There are two coils \(A\) and \(B\) as shown in the fig. A current starts following in B as shown when \(A\) is moved towards \(B\) and current will be zero in \(B\) when \(A\) stops moving we can infer that
1 There is no current in \(A\)
2 There is a constant current in the clockwise direction in \(A\)
3 There is a varying current in \(A\)
4 There is a constant current in the counterclockwise direction in \(A\)
Explanation:
Coil \(A\) must be carrying a constant current in counter clockwise direction. That is why when \(A\) moves towards \(B\), current induced in \(B\) is in counter clockwise direction, as per Lenz's law. The current in \(B\) would stop when \(A\) stops moving.
358675
In the following figure,the magnet is moved towards the coil with a speed \(v\) and induced emf is \(\varepsilon\). If magnet and coil recede away from one another each moving with speed \(v\), the induced emf in the coil will be
Lenz's law governs the direction of induced current in electromagnetic induction.
PHXII06:ELECTROMAGNETIC INDUCTION
358677
A bar magnet is allowed to fall vertically through a copper coil placed in a horizontal plane. The magnet falls with a net acceleration
1 \( = g\)
2 zero
3 \( < g\)
4 \( > g\)
Explanation:
When a bar magnet is allowed to fall through a conductor, e.g., copper coil, the magnetic flux linked with coil changes continuosly and hence eddy currents are induced in it which, according to Lenz's law will be produced in such a direction so as to oppose the change in magnetic flux and hence produce damping effect. Therefore, the net acceleration of magnet will be less than acceleration due to gravity.
KCET - 2017
PHXII06:ELECTROMAGNETIC INDUCTION
358678
If a resistance less rod is moving with constant velocity \(v\) in a constant magnetic field. Then direction of current \(I_{1}\) and \(I_{2}\) in resistance \(R_{1}\) and \(R_{2}\) respectively is :
The magnetic flux is decreasing in the loop on the left and increasing in the loop on the right. \(\therefore\) Using Lenz's law, the direction of current \(I_{1}\) in \(R_{1}\) is clockwise and the direction of current \(I_{2}\) in \(R_{2}\) is anticlockwise.
JEE - 2021
PHXII06:ELECTROMAGNETIC INDUCTION
358679
There are two coils \(A\) and \(B\) as shown in the fig. A current starts following in B as shown when \(A\) is moved towards \(B\) and current will be zero in \(B\) when \(A\) stops moving we can infer that
1 There is no current in \(A\)
2 There is a constant current in the clockwise direction in \(A\)
3 There is a varying current in \(A\)
4 There is a constant current in the counterclockwise direction in \(A\)
Explanation:
Coil \(A\) must be carrying a constant current in counter clockwise direction. That is why when \(A\) moves towards \(B\), current induced in \(B\) is in counter clockwise direction, as per Lenz's law. The current in \(B\) would stop when \(A\) stops moving.
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PHXII06:ELECTROMAGNETIC INDUCTION
358675
In the following figure,the magnet is moved towards the coil with a speed \(v\) and induced emf is \(\varepsilon\). If magnet and coil recede away from one another each moving with speed \(v\), the induced emf in the coil will be
Lenz's law governs the direction of induced current in electromagnetic induction.
PHXII06:ELECTROMAGNETIC INDUCTION
358677
A bar magnet is allowed to fall vertically through a copper coil placed in a horizontal plane. The magnet falls with a net acceleration
1 \( = g\)
2 zero
3 \( < g\)
4 \( > g\)
Explanation:
When a bar magnet is allowed to fall through a conductor, e.g., copper coil, the magnetic flux linked with coil changes continuosly and hence eddy currents are induced in it which, according to Lenz's law will be produced in such a direction so as to oppose the change in magnetic flux and hence produce damping effect. Therefore, the net acceleration of magnet will be less than acceleration due to gravity.
KCET - 2017
PHXII06:ELECTROMAGNETIC INDUCTION
358678
If a resistance less rod is moving with constant velocity \(v\) in a constant magnetic field. Then direction of current \(I_{1}\) and \(I_{2}\) in resistance \(R_{1}\) and \(R_{2}\) respectively is :
The magnetic flux is decreasing in the loop on the left and increasing in the loop on the right. \(\therefore\) Using Lenz's law, the direction of current \(I_{1}\) in \(R_{1}\) is clockwise and the direction of current \(I_{2}\) in \(R_{2}\) is anticlockwise.
JEE - 2021
PHXII06:ELECTROMAGNETIC INDUCTION
358679
There are two coils \(A\) and \(B\) as shown in the fig. A current starts following in B as shown when \(A\) is moved towards \(B\) and current will be zero in \(B\) when \(A\) stops moving we can infer that
1 There is no current in \(A\)
2 There is a constant current in the clockwise direction in \(A\)
3 There is a varying current in \(A\)
4 There is a constant current in the counterclockwise direction in \(A\)
Explanation:
Coil \(A\) must be carrying a constant current in counter clockwise direction. That is why when \(A\) moves towards \(B\), current induced in \(B\) is in counter clockwise direction, as per Lenz's law. The current in \(B\) would stop when \(A\) stops moving.
358675
In the following figure,the magnet is moved towards the coil with a speed \(v\) and induced emf is \(\varepsilon\). If magnet and coil recede away from one another each moving with speed \(v\), the induced emf in the coil will be
Lenz's law governs the direction of induced current in electromagnetic induction.
PHXII06:ELECTROMAGNETIC INDUCTION
358677
A bar magnet is allowed to fall vertically through a copper coil placed in a horizontal plane. The magnet falls with a net acceleration
1 \( = g\)
2 zero
3 \( < g\)
4 \( > g\)
Explanation:
When a bar magnet is allowed to fall through a conductor, e.g., copper coil, the magnetic flux linked with coil changes continuosly and hence eddy currents are induced in it which, according to Lenz's law will be produced in such a direction so as to oppose the change in magnetic flux and hence produce damping effect. Therefore, the net acceleration of magnet will be less than acceleration due to gravity.
KCET - 2017
PHXII06:ELECTROMAGNETIC INDUCTION
358678
If a resistance less rod is moving with constant velocity \(v\) in a constant magnetic field. Then direction of current \(I_{1}\) and \(I_{2}\) in resistance \(R_{1}\) and \(R_{2}\) respectively is :
The magnetic flux is decreasing in the loop on the left and increasing in the loop on the right. \(\therefore\) Using Lenz's law, the direction of current \(I_{1}\) in \(R_{1}\) is clockwise and the direction of current \(I_{2}\) in \(R_{2}\) is anticlockwise.
JEE - 2021
PHXII06:ELECTROMAGNETIC INDUCTION
358679
There are two coils \(A\) and \(B\) as shown in the fig. A current starts following in B as shown when \(A\) is moved towards \(B\) and current will be zero in \(B\) when \(A\) stops moving we can infer that
1 There is no current in \(A\)
2 There is a constant current in the clockwise direction in \(A\)
3 There is a varying current in \(A\)
4 There is a constant current in the counterclockwise direction in \(A\)
Explanation:
Coil \(A\) must be carrying a constant current in counter clockwise direction. That is why when \(A\) moves towards \(B\), current induced in \(B\) is in counter clockwise direction, as per Lenz's law. The current in \(B\) would stop when \(A\) stops moving.
358675
In the following figure,the magnet is moved towards the coil with a speed \(v\) and induced emf is \(\varepsilon\). If magnet and coil recede away from one another each moving with speed \(v\), the induced emf in the coil will be
Lenz's law governs the direction of induced current in electromagnetic induction.
PHXII06:ELECTROMAGNETIC INDUCTION
358677
A bar magnet is allowed to fall vertically through a copper coil placed in a horizontal plane. The magnet falls with a net acceleration
1 \( = g\)
2 zero
3 \( < g\)
4 \( > g\)
Explanation:
When a bar magnet is allowed to fall through a conductor, e.g., copper coil, the magnetic flux linked with coil changes continuosly and hence eddy currents are induced in it which, according to Lenz's law will be produced in such a direction so as to oppose the change in magnetic flux and hence produce damping effect. Therefore, the net acceleration of magnet will be less than acceleration due to gravity.
KCET - 2017
PHXII06:ELECTROMAGNETIC INDUCTION
358678
If a resistance less rod is moving with constant velocity \(v\) in a constant magnetic field. Then direction of current \(I_{1}\) and \(I_{2}\) in resistance \(R_{1}\) and \(R_{2}\) respectively is :
The magnetic flux is decreasing in the loop on the left and increasing in the loop on the right. \(\therefore\) Using Lenz's law, the direction of current \(I_{1}\) in \(R_{1}\) is clockwise and the direction of current \(I_{2}\) in \(R_{2}\) is anticlockwise.
JEE - 2021
PHXII06:ELECTROMAGNETIC INDUCTION
358679
There are two coils \(A\) and \(B\) as shown in the fig. A current starts following in B as shown when \(A\) is moved towards \(B\) and current will be zero in \(B\) when \(A\) stops moving we can infer that
1 There is no current in \(A\)
2 There is a constant current in the clockwise direction in \(A\)
3 There is a varying current in \(A\)
4 There is a constant current in the counterclockwise direction in \(A\)
Explanation:
Coil \(A\) must be carrying a constant current in counter clockwise direction. That is why when \(A\) moves towards \(B\), current induced in \(B\) is in counter clockwise direction, as per Lenz's law. The current in \(B\) would stop when \(A\) stops moving.
