Electrical Inductors MCQ Questions & Answers

1

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

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Answer & Solution

Answer: Option D

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2

An 18 V power supply is connected across a coil with a winding resistance of 180 Ω. Current flow in the coil is

A) 1 mA B) 10 mA C) 100 mA D) 1 A

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Answer & Solution

Answer: Option C

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3

An inductor, a 1 kΩ resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is

A) 0 V B) 6 V C) 12 V D) 4 V

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Answer & Solution

Answer: Option B

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4

Five inductors are connected in series. The lowest value is 8 µH. If the value of each inductor is twice that of the preceding one, and if the inductors are connected in order of ascending values, the total inductance is

A) 8 H B) 32 µH C) 64 µH D) 248 µH

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Answer & Solution

Answer: Option D

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5

A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is

A) 55 mH B) Less than 0.2 mH C) Less than 5.5 mH D) 5.5 mH

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Answer & Solution

Answer: Option D

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6

A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is

A) 9.9 mH B) Greater than 5 mH C) 9.9 mH or greater than 5 mH D) Less than 0.6 mH

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Answer & Solution

Answer: Option D

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7

Three 15 mH inductors are in series. The total inductance is

A) 15 mH B) 30 mH C) 45 mH D) 5 mH

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Answer & Solution

Answer: Option C

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8

An inductance of 0.08 µH is larger than

A) 0.0000008 H B) 0.000000008 H C) 0.000008 H D) 0.00008 mH

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Answer & Solution

Answer: Option B

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9

An inductance of 0.43 mH is smaller than

A) 43 µH B) 430 µH C) 0.05 H D) 0.00043 H

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Answer & Solution

Answer: Option C

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10

The voltage across a coil when $$\frac{{{\text{di}}}}{{{\text{dt}}}}$$ = 20 mA/µs and L = 8 µH is

A) 16 mV B) 160 mV C) 1.6 mV D) 2.5 mV

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Answer & Solution

Answer: Option B

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Electrical Inductors MCQ Questions & Answers | Electrical Engineering