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Electronics - Inductors

Exercise : Inductors - General Questions
26.
Inductance is:
directly proportional to the length of the coil
directly proportional to the number of turns on the coil
inversely proportional to the cross-sectional area of the coil
inversely proportional to the permeability
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
Current will cause a magnetic field in a conductor as follows:
An ac current causes a fixed polarity magnetic field.
A dc current causes a fixed polarity magnetic field.
A dc current causes an alternating magnetic field.
An ac current causes a fixed polarity magnetic field and a dc current causes an alternating magnetic field.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
What is the total inductance, assuming no mutual inductance?

mcq8_1030_1.gif
12 mH
6 mH
0.73 mH
0 mH
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
During a current change, the ability of a conductor to produce counter emf within itself is called:
back emf
self-induction
a henry
impedance
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.

If the switch is moved to position 1 in the given circuit, how long will it take for the current to reach its maximum value?

72.5 mu.gifs
532 mu.gifs
610 mu.gifs
833 mu.gifs
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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