Electrical Inductors(Engineering > Electrical Engineering ) Questions and Answers
Question 1. 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
Explanation:-
Answer: Option D. -> Increasing the number of turns or using thinner wire
Question 2. An 18 V power supply is connected across a coil with a winding resistance of 180 Ω. Current flow in the coil is
1 mA
10 mA
100 mA
1 A
Explanation:-
Answer: Option C. -> 100 mA
Question 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
0 V
6 V
12 V
4 V
Explanation:-
Answer: Option B. -> 6 V
Question 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
8 H
32 µH
64 µH
248 µH
Explanation:-
Answer: Option D. -> 248 µH
Question 5. A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is
55 mH
Less than 0.2 mH
Less than 5.5 mH
5.5 mH
Explanation:-
Answer: Option D. -> 5.5 mH
Question 6. A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is
9.9 mH
Greater than 5 mH
9.9 mH or greater than 5 mH
Less than 0.6 mH
Explanation:-
Answer: Option D. -> Less than 0.6 mH
Question 7. An inductance of 0.08 µH is larger than
0.0000008 H
0.000000008 H
0.000008 H
0.00008 mH
Explanation:-
Answer: Option B. -> 0.000000008 H
Question 8. Three 15 mH inductors are in series. The total inductance is
15 mH
30 mH
45 mH
5 mH
Explanation:-
Answer: Option C. -> 45 mH
Question 9. The voltage across a coil when di/dt = 20 mA/µs and L = 8 µH is
16 mV
160 mV
1.6 mV
2.5 mV
Explanation:-
Answer: Option B. -> 160 mV
Question 10. An inductance of 0.43 mH is smaller than