Related Questions

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
Doubling the operating frequency of an inductive circuit:
A has no effect on the inductive reactance
B doubles the amount of inductive reactance
C multiplies the inductive reactance by 6.28
D cuts the inductive reactance in half
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
Doubling the operating frequency of a capacitive circuit:
A doubles the amount of a capacitive reactance
B has no effect on the capacitive reactance
C cuts the capacitive reactance in half
D multiplies the capacitive reactance by 6.28
E None of the above
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
For a purely inductive circuit which of the following is true?
A Apparent power is zero
B Relative power is zero
C Actual power of the circuit is zero
D Any capacitance even if present in the circuit will not be charged
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
An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then
A VR = VL
B VL
C VL = VR
D VL > VR
At __________ frequencies the parallel R-L circuit behaves as purely resistive.
A Low
B Very low
C High
D Very high
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

Next steps