# Home / EEE / Inductors :: General Questions

### EEE :: Inductors

1. An inductance of 0.08 H is larger than

2.  A. 0.0000008 H B. 0.000000008 H C. 0.000008 H D. 0.00008 mH   3. A 240 H inductor is equivalent to a

4.  A. 0.240 mH inductor B. 0.000240 mH inductor C. 240 mH inductor D. 240 H inductor   5. A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is

6.  A. 55 mH B. less than 0.2 mH C. less than 5.5 mH D. 5.5 mH   7. A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is

8.  A. 9.9 mH B. greater than 5 mH C. 9.9 mH or greater than 5 mH D. less than 0.6 mH   9. The voltage across a coil when di/dt = 20 mA/ s and L = 8 H is

10.  A. 16 mV B. 160 mV C. 1.6 mV D. 2.5 mV   11. A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current

12.  A. is increased B. is decreased C. does not change D. momentarily goes to zero   13. Two 10 H inductors are in parallel and the parallel combination is in series with a third 10 H inductor. What is the approximate total reactance when a voltage with a frequency of 7 kHz is applied across the circuit terminals?

14.  A. 219 k B. 66 k C. 660 k D. 1.3 M    15. An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is

16.  A. good B. open C. shorted D. partly shorted   17. Two inductors, L1 and L2, are in parallel. L1 has a value of 25 H and L2 a value of 50 H. The parallel combination is in series with L3, a 20 H coil. The entire combination is across an ac source of 60 Vrms at 300 kHz. The total rms current is

18.  A. 87 mA B. 870 mA C. 87 A D. 337 mA   19. An inductor, a 1 k resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is

20.  A. 0 V B. 6 V C. 12 V D. 4 V   