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Inductors
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
12 V
6 V
4 V
0 V
12 V
6 V
4 V
0 V
Answer
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Related Question
Inductors
An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then
VL < VR
VR ≥ VL
VL > VR
VL = VR
VL < VR
VR ≥ VL
VL > VR
VL = VR
Answer
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Inductors
A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current
is increased
does not change
momentarily goes to zero
is decreased
is increased
does not change
momentarily goes to zero
is decreased
Answer
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Inductors
When the current through an inductor decreases, the amount of energy stored in the electromagnetic field
remains the same
decreases
increases
doubles
remains the same
decreases
increases
doubles
Answer
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Inductors
Three 15 mH inductors are in series. The total inductance is
30 mH
15 mH
5 mH
45 mH
30 mH
15 mH
5 mH
45 mH
Answer
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Inductors
The voltage across a coil when di/dt = 20 mA/s and L = 8 H is
160 mV
16 mV
2.5 mV
1.6 mV
160 mV
16 mV
2.5 mV
1.6 mV
Answer
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