Related Questions

If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because
A varying voltage produces the charging and dicharging currents
B of high peak value
C charging current can flow
D discharge current can flow
In an RC circuit, the impedance is determined by both the resistance and the capacitive reactance combined.
A True
B False
Resonance is a condition in a series RLC circuit in which the capacitive and inductive reactances are equal in magnitude.
A True
B False
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
Time constant of a capacitive circuit
A Increases with the decrease of capacitance and decrease of resistance
B Increases with the decrease of capacitance and increase of resistance
C Increases with the increase of capacitance and decrease of resistance
D Increase with increase of capacitance and increase of resistance
In a capacitive circuit
A a steady value of applied voltage causes discharge
B an increase in applied voltage makes a capacitor charge
C decrease in applied voltage makes a capacitor charge
D none of the above
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
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
The total capacitive reactance of a parallel capacitor circuit is:
A equal to the sum of the individual capacitive-reactance values
B equal to the sum of the individual capacitance values
C equal to the source voltage divided by total current
D less than the capacitance value of the smallest capacitor
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

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