In a capacitive circuit

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 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

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

In a capacitive circuit

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