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Inductors
An 18 V power supply is connected across a coil with a winding resistance of 180 . Current flow in the coil is
10 mA
100 mA
1 mA
1 A
10 mA
100 mA
1 mA
1 A
Answer
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Related Question
Inductors
A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is
less than 5.5 mH
less than 0.2 mH
55 mH
5.5 mH
less than 5.5 mH
less than 0.2 mH
55 mH
5.5 mH
Answer
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Inductors
The winding resistance of a coil can be increased by
increasing the number of turns or using thinner wire
changing the core material
using a thinner wire
increasing the number of turns
increasing the number of turns or using thinner wire
changing the core material
using a thinner wire
increasing the number of turns
Answer
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Inductors
An inductance of 0.43 mH is smaller than
0.00043 H
43 μH
0.05 H
430 μH
0.00043 H
43 μH
0.05 H
430 μH
Answer
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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?
57 mA
91 mA
78 mA
400 mA
57 mA
91 mA
78 mA
400 mA
Answer
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Inductors
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
64 μH
32 μH
8 H
248 μH
64 μH
32 μH
8 H
248 μH
Answer
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