Electronic Principles
A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns?

None of these
0.1 A
1000 A
100 A
0.41666666666667

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Electronic Principles
In a pure inductor:

None of these
ac current and voltage are exactly in phase
ac current lags the voltage by 90 degree
ac current is converted to dc voltage
ac current leads the voltage by 90 degree

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Electronic Principles
Which one of the following statements is true for voltage in a series circuit?

The total voltage in a series circuit is always less than the value of the smallest voltage
The total voltage of a series circuit is equal to the total current divided by the total resistance
The total voltage is equal to the sum of the individual voltages in a series circuit
The total voltage in a series circuit is equal to the average value of the individual voltages
None of these

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