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

All of these
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
None of these

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Electronic Principles
Which one of the following statements best applies to a series RLC circuit?

None of these
All of these
The current waveform for each component always has the same amplitude and phase as the applied current
The sum of the current is always less than the applied current
The voltage waveform for each component always has the same amplitude and phase as the applied voltage

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Electronic Principles
Which one of the following is a statement of KirchhofFs voltage law?

None of these
The total voltage in a parallel circuit is less than the value of the smallest voltage
The algebraic sum of voltages in a loop is equal to zero
The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it
The algebraic sum of voltages entering and leaving a point is equal to zero

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