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

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

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Electronic Principles
A high-pass filter:

has no effect on ac signals
passes lower-frequency signals and reduces higher-frequency signals
increases the level of all frequencies by a significant amount
None of these
passes higher-frequency signals and reduces lower-frequency signals

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

The total current is equal to the sum of the currents for the resistance and capacitance
The current always has the same amplitude and phase for every part of the circuit
The total current is less than the sum of the currents for the resistance and capacitance
None of these
The total current. is greater than the sum of the currents for the resistance and capacitance

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Electronic Principles
Which one of the following statements most accurately reflects the nature of ac power?

The current in an ac circuit flows in one direction, but changes value periodically
None of these
The current in an ac circuit flows in two directions at the same time
The current in an ac circuit flows in one direction at a steady level
The current in an ac circuit changes direction periodically

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

None of these
Combinations of resistance and capacitive reactance provide any opposition to current flow
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

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