Related Questions

Which one of the following phrases most accurately describes a purely inductive circuit?
A Resistances provide the only opposition to current flow
B Inductive reactance provides the only opposition to current flow
C Combinations of resistance and inductive reactance provide any opposition to current flow
D The ac voltage lags the current by 90 degree
E None of the above
In a purely inductive circuit
A Actual power is zero
B Reactive power is zero
C Apparent power is zero
D None of above is zero
Doubling the operating frequency of a purely inductive circuit:
A doubles the amount of current through the inductors
B has no effect on the current through the inductors
C cuts the current through the inductors one-half
D increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit
E None of the above
Which one of the following phrases most accurately describes a purely capacitive circuit?
A Resistances provide the only opposition to current flow
B Capacitive reactance provides the only opposition to current flow
C The ac voltage leads the current by 90 degree
D Combinations of resistance and capacitive reactance provide any opposition to current flow
E None of the above
Doubling the operating voltage of a purely capacitive circuit:
A has no effect on the capacitive reactance
B doubles the amount of capacitive reactance
C multiplies the capacitive reactance by 7
D cuts the capacitive reactance in half
E None of the above
At __________ frequencies the parallel R-L circuit behaves as purely resistive.
A Low
B Very low
C High
D Very high
Doubling the operating frequency of a purely capacitive circuit:
A has no effect on the total circuit current
B doubles the amount of total current
C cuts the total current by one-half
D thrice the amount of total current
E None of the above
Resonance is a condition in a series RLC circuit in which the capacitive and inductive reactances are equal in magnitude.
A True
B False
In an RL circuit, the impedance is determined by both the resistance and the inductive reactance combined.
A True
B False
Time constant of an inductive circuit
A Increases with increase of inductance and decrease of resistance
B Increases with the increase of inductance and the increase of resistance
C Increases with the decrease of inductance and decrease of resistance
D Increases with decrease of inductance and increase of resistance

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