Electromagnetic Induction - 2 - Free Assertion & Reason Questions

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): When two identical loops of copper and Aluminium are rotated with same speed in the same magnetic field, the induced e.m.f. will be the same.

Reason (R): Resistance of the two loops are equal.

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): If the number of turns of a coil is increased, it becomes more difficult to push a bar magnet towards the coil.

Reason (R): The difficulty faced is according to Lenz’s law.

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): The cores of electromagnets are made of soft iron.

Reason (R): Coercivity of soft iron is small.

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): Self inductance may be called the inertia of electricity.

Reason (R): Due to self inductance, opposing induced e.m.f. is generated in a coil as a result of change in current or magnetic flux linked with the coil.

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 : Faraday’s laws are consequence of conservation of energy.

Reason : In a purely resistive ac circuit, the current legs behind the emf in phase.

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 : Lenz’s law violates the principle of conservation of energy.

Reason : Induced emf always opposes the change in magnetic flux responsible for its production.

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 : Acceleration of a magnet falling through a long solenoid decreases.

Reason : The induced current produced in a circuit always flow in such direction that it opposes the change to the cause that produced it.

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 emf can be induced by moving a conductor in a magnetic field.

Reason : An emf can be induced by changing the magnetic field.

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 : Eddy currents are produced in any metallic conductor when magnetic flux is changed around it.

Reason : Electric potential determines the flow of charge.

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 : When number of turns in a coil is doubled, coefficient of self-inductance of the coil becomes 4 times.

Reason : This is because L α N².