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Electrical Engineering - Inductors

Exercise : Inductors - General Questions
11.
The winding resistance of a coil can be increased by
increasing the number of turns
using a thinner wire
changing the core material
increasing the number of turns or using thinner wire
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
An inductance of 0.43 mH is smaller than
43 H
430 H
0.05 H
0.00043 H
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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
VR ≥ VL
VL < VR
VL = VR
VL > VR
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil is
1.8 mV
18 mV
180 mV
1.25 mV
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
When the current through an inductor decreases, the amount of energy stored in the electromagnetic field
increases
decreases
remains the same
doubles
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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