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Standard XII

Physics

Lenz's Law

In the space ...

Question

In the space shown a non-uniform magnetic field $\to B = B_{0} (1 + x) (^- k)$ tesla is present. A closed loop of small resistance, placed in the x-y plane is given velocity $V_{0}$ . The force due to magnetic field on the loop is

zero

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along

+ x

direction

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along

- x

direction

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along

+ y

direction

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none of these

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Solution

The correct option is D along $- x$ direction
Field is constant along the y direction. As the loop moves towards x direction, field changes. This changes the flux and by Lenz's a law current is induced that opposes this motion along x direction.
Therefore force will be along -x direction.

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In the space shown a non-uniform magnetic field →B=B0(1+x)(^−k) tesla is present. A closed loop of small resistance, placed in the x-y plane is given velocity V0. The force due to magnetic field on the loop is

The correct option is D along −x directionField is constant along the y direction. As the loop moves towards x direction, field changes. This changes the flux and by Lenz's a law current is induced that opposes this motion along x direction. Therefore force will be along -x direction.

In the space shown a non-uniform magnetic field $\to B = B_{0} (1 + x) (^- k)$ tesla is present. A closed loop of small resistance, placed in the x-y plane is given velocity $V_{0}$ . The force due to magnetic field on the loop is

The correct option is D along $- x$ direction
Field is constant along the y direction. As the loop moves towards x direction, field changes. This changes the flux and by Lenz's a law current is induced that opposes this motion along x direction.
Therefore force will be along -x direction.