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Inductors

Inductors
Three 15 mH inductors are in series. The total inductance is

5 mH
15 mH
45 mH
30 mH

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Inductors
The inductance of an iron-core coil decreases if

the iron core is removed
the length of the coil decreases
None of these
the number of turns is decreased

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Inductors
The voltage across a coil when di/dt = 20 mA/s and L = 8 H is

2.5 mV
160 mV
1.6 mV
16 mV

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Inductors
An inductance of 0.43 mH is smaller than

0.00043 H
430 μH
43 μH
0.05 H

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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

32 μH
248 μH
8 H
64 μH

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Inductors
When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field

does not change
doubles
quadruples
is quartered

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