Electronic Principles
Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question?

1000 W
20 W
None of these
100 W
200 W

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

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
The total voltage in a series circuit is always less than the value of the smallest voltage
None of these

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Electronic Principles
Which one of the following phrases most accurately describes a purely inductive circuit?

Inductive reactance provides the only opposition to current flow
None of these
Resistances provide the only opposition to current flow
The ac voltage lags the current by 90 degree
Combinations of resistance and inductive reactance provide any opposition to current flow

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