Question

an arrangement is placed in a region of uniform magnetic field when the slider is moved a current I is induced in teh circuit in clockwise direction the possible direction of magnetic field is

Answer 1

When electricity flows in a long straight wire it creates a circular or cylindrical magnetic field atound the wire according to right hand rule
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Answer 2

The emf induced is none.

Given:  An arrangement is placed in a region of the uniform magnetic field when the slider is moved a current I is induced in the circuit in a clockwise direction the possible direction of the magnetic field changes with time at a rate Dt/dB. Loop 1 of radius R>r encloses the region r and loop 2 of radius R is outside the region of the magnetic field.

To Find: The EMF generated

Solution:

Emf is induced in a coil due to a change of flux through it.

In the loop 1, the flux passing through it is Bπr to power 2

Hence emf induced=− Dt/dϕ

                                 =− Dt/dB πr to power 2

Since the magnetic field does not tend to change inside the loop. Because of this, no emf is induced in it.

Therefore, the emf induced is none.

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