Basic Electrical Engineering (3110005) MCQs

MCQs of AC Circuits

Showing 21 to 30 out of 117 Questions
1 2 3 4 5 6
21.

In an RLC circuit, which of the following is always used as a vector reference?

(a)

Voltage
(b)

Resistance
(c)

Impedance
(d)

Current
Answer:

Option (a)

22.

Which of the following is not ac waveform?

(a)

Sinusoidal
(b)

Square
(c)

Constant
(d)

Triangular
Answer:

Option (c)

23.

The energy stored in the capacitor is of ______ nature.

(a)

Electrostatic
(b)

Magnetic
(c)

Neither electrostatic nor magnetic
(d)

Either electrostatic or magnetic
Answer:

Option (a)

24.

The energy stored in the inductor is of ______ nature.

(a)

Electrostatic
(b)

Magnetic
(c)

Neither electrostatic nor magnetic
(d)

Either electrostatic or magnetic
Answer:

Option (b)

25.

What is the strength of magnetic field known as _____

(a)

Flux
(b)

Density
(c)

Magnetic strength
(d)

Magnetic Flux Density
Answer:

Option (d)

26.

E.M.F. means _______

(a)

Electromotive Force
(b)

Electromagnetic Force
(c)

Electromagnetic Flux
(d)

Electromotive Flux
Answer:

Option (a)

27.

An EMF can be induced by __________

(a)

Change in the magnetic field only
(b)

Change in the area of cross section only
(c)

Change in angle between magnetic field and area only
(d)

Change in the magnetic field, area or angle between them
Answer:

Option (d)

28.

The period of a wave is _________

(a)

the same as frequency
(b)

time required to complete one cycle
(c)

expressed in amperes
(d)

none of the above
Answer:

Option (b)

29.

The period of a sine wave is 0.02 seconds, its frequency is ________

(a)

20 Hz
(b)

30 Hz
(c)

40 Hz
(d)

50 Hz
Answer:

Option (d)

30.

A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to ____

(a)

Average value
(b)

RMS value
(c)

Peak value
(d)

None of the above
Answer:

Option (b)

Showing 21 to 30 out of 117 Questions
1 2 3 4 5 6