Electronic Principles
Current and voltage are said to be in phase when:

they have the same amplitude and frequency
their waveforms cross through zero and reach positive and negative peaks at the same time
their waveforms are both ac or both dc
All of these
None of these

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

The total voltage is equal to the sum of the voltages across the resistance and inductance
The total voltage lags the total current by less than 90
The total voltages is less than the sum of the voltages across the resistance and inductance
None of these
The voltage always has the same amplitude and phase for every part of the circuit

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Electronic Principles
The north pole of a magnet is the one:

that would be attracted to the earth's north magnetic pole
None of these
that would be attracted to the earth's south magnetic pole
that has its molecules arranged in a random pattern
that would be repelled by the south pole of another magnet

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

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
The total voltage of a series circuit is equal to the total current divided by the total resistance

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