Assertion & Reason Test: Electromagnetic Induction - Grade 12 MCQ

Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Mutual inductance becomes maximum when coils are wound on each other.

Reason (R): Mutual inductance is independent of orientation of coils.

Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.

Assertion: Induced emf will always occur whenever there is change in magnetic flux.

Reason: Current always induces whenever there is change in magnetic flux.

Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.

Assertion: Only a change in magnetic flux will maintain an induced current in the coil.

Reason: The presence of large magnetic flux through a coil maintain a current in the coil of the circuit is continuous.

Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.

Assertion : An induced current has a direction such that the magnetic field due to the current opposes the change in the magnetic flux that induces the current.

Reason : Above statement is in accordance with conservation of energy.

Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.

Assertion : Figure shows a horizontal solenoid connected to a battery and a switch. A copper ring is placed on a smooth surface, the axis of the ring being horizontal. As the switch is closed, the ring will move away from the solenoid.

Reason : Induced emf in the ring, e=-dΦ/dt

Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.

Assertion : Figure shows a metallic conductor moving in magnetic field. The induced emf across its ends is zero.

Reason : The induced emf across the ends of a conductor is given by e = Bvℓ sinθ.

Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.

Assertion : An induced emf appears in any coil in which the current is changing.

Reason : Self induction phenomenon obeys Faraday’s law of induction.