Electric Circuits and electron devices mcq with answers

What is Electrical circuit

Electrical circuit is an interconnection of electrical components. An electrical circuit consists of batteries, resistors, inductors, capacitors, switches or transistors. An electrical network consists of a closed loop. A circuit is a closed path where electrons flow in a wire. As long as the copper wire is allowed to itself, the electrons drift between the atoms but never leave the copper.

An electronic circuit is composed of individual electronic components, such as resistors, transistors, capacitors, inductors and diodes, connected by conductive wires or traces through which electric current can flow. -Wikipedia

Electric Circuits mcq and answer :-

1)A short thin piece of wire which is heated up and melt by the flowing of electric current in it, is called?
A. circuit
B.fuse
C. cell
D. resistor
Ans: B

2)In a parallel circuit the current flowing from the source to each path is?
A. greater
B. lesser
C. equal
D. unequal
Ans: B

3) Form Factor is the ratio of?
A. Average value/r.m.s. value
B. Average value/peak value
C. r.m.s. value/average value
D. r.m.s. value/peak value
Ans: C

4)Power factor of the following circuit will be zero ?
A. Resistance
B. Inductance
C. Capacitance
D. The double energy transient occur in the
Ans: D

5) Skin effect occurs when a conductor carries current at _________ frequencies. ?
A. Very low
B. Low
C. Medium
D. High
Ans: D

Electric Circuits Objective type Questions with Answers

6)The frequency of an alternating current is ?
A.The speed with which the alternator runs
B. The number of cycles generated in one minute
C. The number of waves passing through a point in one second
D.The number of electrons passing through a point in one second
Ans: C

7)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
Ans: C

8)In a sine wave the slope is constant
A. Between 0° and 90°
B. Between 90° and 180°
C. Between 180° and 270°
D. No where
Ans: D

9) Time constant of an inductive circuit
A. Increases with increase of inductance and decrease of resistance
B. Increases with the increase of inductance and the increase of resistance
C. Increases with the decrease of inductance and decrease of resistance
D. Increases with decrease of inductance and increase of resistance
Ans: A

10)In a three-phase supply floating neutral is undesirable because it way give rise to ?
A. High voltage across the load
B. Low voltage across the load
C. Unequal line voltages across the load
D. None of these
Ans: C