Question

Which is true about the inductance of a solenoid?

A) It depends on the area of each turn but not on the number of turns per unit length.

B) It depends on the number of turns per unit length but not on the area of each turn.

C) It depends on the number of turns per unit length and the area of each turn.

The current though an inductor increases at a certain rate. Which is true about the self-induced emf of the inductor?

A) It decreases at a constant rate. It is zero.

B) It increases in proportion to the current.

C) It has a constant, nonzero value.

The current though an inductor is constant. Which is true about the self-induced emf of the inductor?

A) It is in the direction of the current so as to decrease the current.

B) It is in the direction opposite that of the current so as to decrease the current.

C) It is in the direction of the current so as to aid the increase the current.

D) It is in the direction opposite that of the current so as to increase the current.

E) It is zero.

If the self-induced emf of an inductor is zero, which is true about the current through it?

A) The current is constant or zero.

B) The current is decreasing.

C) The current is increasing.

When an RL circuit is connected to a battery, which is true about its initial and final states?

A) It initially acts like a broken wire and finally acts like ordinary connecting wire.

B) It initially acts like ordinary connecting wire and finally acts like a broken wire.

C) It acts like broken wire throughout the charging.

D) It acts like ordinary connecting wire throughout the charging.

Answer 1

Which is true about the inductance of a solenoid?

Ans : C it depends on the number of turns and the area of each turn

The current though an inductor increases at a certain rate. Which is true about the self-induced emf of the inductor?

Ans : C it has a constant non zero value

The current though an inductor is constant. Which is true about the self-induced emf of the inductor?

Ans : E it is zero

If the self-induced emf of an inductor is zero, which is true about the current through it?

Ans : A current is constant or zero

When an RL circuit is connected to a battery, which is true about its initial and final states?

Ans : A it initially acts like a broken wire and finally acts like ordinary connecting wire

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