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Inductors
Inductors
When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field
doubles
is quartered
quadruples
does not change
doubles
is quartered
quadruples
does not change
Answer
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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
14 μH
155 μH
6.9 μH
2.2 μH
14 μH
155 μH
6.9 μH
2.2 μH
Answer
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Inductors
The inductance of an iron-core coil decreases if
the number of turns is decreased
the iron core is removed
None of these
the length of the coil decreases
the number of turns is decreased
the iron core is removed
None of these
the length of the coil decreases
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
32 μH
8 H
64 μH
248 μH
32 μH
8 H
64 μH
248 μH
Answer
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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?
48 s
0.48 μs
0.48 ms
0.48 s
48 s
0.48 μs
0.48 ms
0.48 s
Answer
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