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Inductors

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 A
1 mA

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Inductors
An inductance of 0.08 μH is larger than

0.000000008 H
0.00008 mH
0.000008 H
0.0000008 H

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Inductors
A 320 H coil is in series with a 3.3 k resistor. How long does it take for current to build up to its full value?

0.48 s
48 s
0.48 μs
0.48 ms

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Inductors
A 240 H inductor is equivalent to a

0.000240 mH inductor
0.240 mH inductor
240 mH inductor
240 H inductor

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Inductors
The inductance of an iron-core coil decreases if

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

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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
64 μH
8 H
248 μH

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