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 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 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 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
A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased
A VR > VC
B VC > VR
C VR = VC
D VR and VC = 0
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
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 highly capacitive circuit the
A Apparent power is equal to the actual power
B Reactive power is more than the apparent power
C Reactive power is more than the actual power
D Actual power is more than its reactive power

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