# Electrical Engineering - Inductors

### Exercise :: Inductors - General Questions

11.

The winding resistance of a coil can be increased by

 A. increasing the number of turns B. using a thinner wire C. changing the core material D. increasing the number of turns or using thinner wire

Explanation:

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12.

An inductance of 0.43 mH is smaller than

 A. 43 H B. 430 H C. 0.05 H D. 0.00043 H

Explanation:

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13.

An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then

 A. VR ≥ VL B. VL < VR C. VL = VR D. VL > VR

Explanation:

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14.

The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil is

 A. 1.8 mV B. 18 mV C. 180 mV D. 1.25 mV

Explanation:

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15.

When the current through an inductor decreases, the amount of energy stored in the electromagnetic field

 A. increases B. decreases C. remains the same D. doubles