1. Capacitive susceptance is a measure of ?

reactive power in a circuit

the extent of neutralisation of reactive power in a circuit

a purely capacitive circuit's ability to pass current

a purely capacitive circuit's ability to resist the flow of current

Answer: a purely capacitive circuit's ability to pass current

Explanation:


2. A resonance curve for a series circuit is a plot of frequency versus ?

current

voltage

impedance

reactance

Answer: current

Explanation:


3. Which of the following is not a non-linear element ?

Transistor

Heater coil

Diode

Electric arc with unlike electrodes

Answer: Heater coil

Explanation:


4. A parallel A.C. circuit in resonance will ?

have a high voltage developed across each inductive and capacitive section

have a high impedance

act like a resistor of low value

have current in each section equal to the line current

Answer: have a high impedance

Explanation:


5. In an A.C. circuit, a low value of kVAR compared with kW indicates ?

low efficiency

high power factor

unity power factor

maximum load current

Answer: high power factor

Explanation:


6. Time constant of an inductive circuit ?

increases with increase of inductance and decrease of resistance

increases with the increase of inductance and the increase of resistance

increases with decrease of inductance and decrease of resistance

increases with decrease of inductance and increase of resistance

Answer: increases with increase of inductance and decrease of resistance

Explanation:


7. In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will ?

be reduced by half

be doubled

be four times as high

be reduced to one fourth

Answer: be doubled

Explanation:


8. The series and parallel resonance on L-C circuit differs in that ?

series resistance needs a low-resistance source for sharp rise in current

series resonance needs a high-resistance source for sharp increase in current

parallel resonance needs a low resistance source for a sharp increase in impedance

parallel resonance needs a low resistance source for a sharp rise in line current

Answer: series resistance needs a low-resistance source for sharp rise in current

Explanation:


9. Inductance of coil ?

is unaffected by the supply frequency

decreases with the increase m supply frequency

increases with the increase in supply frequency

becomes zero with the increase in supp]y frequency

Answer: increases with the increase in supply frequency

Explanation:


10. Pure inductive circuit ?

consumes some power on average

does not take power at all from a line

takes power from the line during some part of the cycle and then returns back to it during other part of the cycle

none of the above

Answer: takes power from the line during some part of the cycle and then returns back to it during other part of the cycle

Explanation: