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

Inductors
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

870 mA

87 A

87 mA

337 mA

870 mA

87 A

87 mA

337 mA

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

greater than 5 mH

9.9 mH or greater than 5 mH

9.9 mH

less than 0.6 mH

greater than 5 mH

9.9 mH or greater than 5 mH

9.9 mH

less than 0.6 mH

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Inductors
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?

66 kΩ

219 kΩ

1.3 MΩ

660 kΩ

66 kΩ

219 kΩ

1.3 MΩ

660 kΩ

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Inductors
An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is

shorted

open

good

partly shorted

shorted

open

good

partly shorted

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Inductors
The following coils are in parallel: 75 H, 40 H, 25 H, and 15 H. The total inductance is approximately

2.2 μH

6.9 μH

14 μH

155 μH

2.2 μH

6.9 μH

14 μH

155 μH

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Inductors
A switch, a 220 Ω resistor, and a 60 mH inductor are in series across a 20 V battery. What is the current through the inductor two time constants after the switch is closed?

78 mA

91 mA

57 mA

400 mA

78 mA

91 mA

57 mA

400 mA

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Inductors

Inductors 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

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

Inductors 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?

Inductors An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is

Inductors The following coils are in parallel: 75 H, 40 H, 25 H, and 15 H. The total inductance is approximately

Inductors A switch, a 220 Ω resistor, and a 60 mH inductor are in series across a 20 V battery. What is the current through the inductor two time constants after the switch is closed?

Inductors
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

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

Inductors
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?

Inductors
An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is

Inductors
The following coils are in parallel: 75 H, 40 H, 25 H, and 15 H. The total inductance is approximately

Inductors
A switch, a 220 Ω resistor, and a 60 mH inductor are in series across a 20 V battery. What is the current through the inductor two time constants after the switch is closed?