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

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

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Electronic Principles
What is the difference between the kinds of charges for an electron and a proton?

An electron has a positive charge and a proton has no charge
An electron has a negative charge and a proton has a positive charge
An electron has a negative charge and a proton has no charge
None of these
An electron has a positive charge and a proton has a negative charge

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

The ac voltage leads the current by 90 degree
Resistances provide the only opposition to current flow
Capacitive reactance provides the only opposition to current flow
Combinations of resistance and capacitive reactance provide any opposition to current flow
None of these

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

None of these
The total voltage is equal to the sum of the voltages across the individual branches in a parallel circuit
The total voltage of a parallel circuit is the same as the voltages across each branch
The total voltage in a parallel circuit is always less than the value of the smallest voltage
The total voltage in a parallel circuit is equal to the average value of the individual voltages

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

None of these
The total current in a series circuit is equal to the sum of the currents flowing through the individual components in the circuit
The same current flows through every part of a series circuit
The amount of current flow through each part of a series circuit can be different, depending on the resistance of each part and the amount of voltage applied to it
The total current in a series circuit is equal to the total voltage multiplied by the total resistance

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