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Electromagnetic induction: Faraday's law, induced emf and current, Lenz's law, eddy currents, self and mutual inductance Mock Test for JEE

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Part of Electromagnetic Induction and Alternating Currents in JEE Main Physics.

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Q1PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

Which of the following is true in context of Eddy currents?

Q2PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

A circuit has a self-inductance of

1 \boldsymbol{H}

and carries a current of

2 A .

To prevent sparking, when the circuit is switched off, a capacitor which can withstand

400 V

is used. The least capacitance of the capacitor connected across the switch must be equal to

Q3PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

A magnet is allowed to fall through a copper circular wire. Then during fall:

Q4PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

If given arrangement is moving towards left with speed

v,

then potential difference between

B

and

D

and current in the loop are respectively.

Q5PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

Magnitude of e.m.f. produced in a coil when a magnet is inserted into it does not depend upon:

Q6PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

toppr Q Type your question insulated from each other. The entire loop lies in the plane (of the paper). A uniform magnetic field

B

point into the plane of the paper. At

t=0,

the loop starts rotating about the common diameter as axis with a constant angular velocity

\omega

in the magnetic field Which of the following options is/are correct? This question has multiple correct options

Q7PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

When a coil rotated in magnetic field induced current in it :

Q8PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

A current is induced in a coil by electromagnetic induction.

Q9PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

A conductor

A B

of length

l

moves in

x-y

plane with velocity

\overrightarrow{\boldsymbol{v}}=\boldsymbol{v}_{0}(\hat{\boldsymbol{i}}-\hat{\boldsymbol{j}}) \cdot \boldsymbol{A}

magnetic field

\vec{B}=B_{0}(\hat{i}+\hat{j})

exists in the region. The induced emf is

Q10PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

In ballistic galvanometer, the frame on which the coil is wound is non-metallic to:

Q11PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

An induced e.m.f. is produced when a magnet is plunged into a coil. The strength of the induced e.m.f. is independent of

Q12PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

Which statement is incorrect related to induced electric field due to changing magnetic flux?

Q13PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

A closed iron ring is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. The acceleration of the falling magnet is:

Q14PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

The value of mutual inductance can be increased by

Q15PhysicsUnit 14: Electromagnetic Induction and Alternating Currents

In electromagnetic induction, the induced E.M.F is independent of

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