Alternating Current MCQ - Electrician (Set-1) with Answers

Alternating Current MCQ - Electrician (Set-1) with Answers

16) The power factor is defined as the ratio of :

Answer is:

watts to volt amperes

Explanation:

Power factor (PF) is the ratio of working power, measured in kilowatts (kW), to apparent power, measured in kilovolt amperes (kVA). Apparent power, also known as demand, is the measure of the amount of power used to run machinery and equipment during a certain period.

17) The power factor of an inductive circuit can be improved by connecting a capacitor to it in :

Answer is:

parallel

18) Which supply source changes the polarity constantly ?

Answer is:

AC supply

19) The average value of alternating current for a pure sine wave is equal to :

Answer is:

0.636 x maximum value of current

20) The reactance of a 2 henry choke coil at 100 Hz is :

Answer is:

16) The power factor is defined as the ratio of :

watts to volt amperes

17) The power factor of an inductive circuit can be improved by connecting a capacitor to it in :

parallel

18) Which supply source changes the polarity constantly ?

AC supply

19) The average value of alternating current for a pure sine wave is equal to :

0.636 x maximum value of current

20) The reactance of a 2 henry choke coil at 100 Hz is :

1256 ohm