Q.

In the space shown a non-uniform magnetic field B=B01+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

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a

zero

b

along +x direction

c

along -x direction

d

along +y direction

answer is C.

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Detailed Solution

Use Lenz's law. Induced emf of the current opposes the change in flux through it.

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In the space shown a non-uniform magnetic field B⇀=B01+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