Explore topic-wise MCQs in Electrical Engineering Questions.

This section includes 46 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.

1.

A passive network is one which contains____________?
A. only variable resistances
B. only some sources of e.m.f. in it
C. only two sources of e.m.f. in it
D. no source of e.m.f. in it
Answer» E.
Discussion
2.

In a series parallel circuit, any two resistances in the same current path must be in___________?
A. series with each other
B. parallel with each other
C. series with the voltage source
D. parallel with the voltage source
Answer» B. parallel with each other
Discussion
3.

Choose the incorrect statement: A branch formed by the parallel connection.
A. A branch formed by the parallel connection of any resistor R and open circuit has the characteristic of an open circuit.
B. A branch formed by the parallel connection of any resistor R and a short circuit has the characteristic of a short circuit.
C. A branch formed by the series connection of any resistor R and an open circuit has the characteristic of an open circuit.
D. A branch formed by the series connection of any resistor R and a short circuit has the characteristic of resistor R.
Answer» B. A branch formed by the parallel connection of any resistor R and a short circuit has the characteristic of a short circuit.
Discussion
4.

The superposition theorem is applicable to____________?
A. linear, non-linear and time variant responses
B. linear and non-linear resistors only
C. linear responses only
D. none of the above
Answer» D. none of the above
Discussion
5.

Between the branch voltages of a loop the Kirchhoff s voltage law imposes_____________?
A. non-linear constraints
B. linear constraints
C. no constraints
D. none of the above
Answer» C. no constraints
Discussion
6.

Which of the following is a bilateral element?
A. Constant current source
B. Constant voltage source
C. Capacitance
D. None of the above
Answer» D. None of the above
Discussion
7.

The concept on which Superposition theorem is based on_____________?
A. reciprocity
B. duality
C. non-linearity
D. linearity
Answer» E.
Discussion
8.

According to Kirchhoffs voltage law, the algebraic sum of all IR drops and e.m.fs. in any closed loop of a network is always____________?
A. negative
B. positive
C. determined by battery e.m.fs.
D. zero
Answer» E.
Discussion
9.

For a voltage source:
A. terminal voltage is always lower than source e.m.f.
B. terminal voltage cannot be higher than source e.m.f.
C. the source e.m.f. and terminal voltage are equal
D. None
Answer» C. the source e.m.f. and terminal voltage are equal
Discussion
10.

Kirchhoff s law is applicable to____________?
A. passive networks only
B. a.c. circuits only
C. d.c. circuits only
D. both a.c. as well d.c. circuits
Answer» E.
Discussion
11.

“Maximum power output is obtained from a network when the load resistance is equal to the output resistance of the network as seen from the terminals of the load”. The above statement is associated with____________?
A. Millman’s theorem
B. Thevenin’s theorem
C. Superposition theorem
D. Maximum power transfer theorem
Answer» E.
Discussion
12.

A capacitor is generally a____________?
A. bilateral and active component
B. active, passive, linear and nonlinear component
C. linear and bilateral component
D. non-linear and active component
Answer» D. non-linear and active component
Discussion
13.

Kirchhoff s current law states that
A. net current flow at the junction is positive
B. Hebraic sum of the currents meeting at the junction is zero
C. no current can leave the junction without some current entering it
D. total sum of currents meeting at the junction is zero
Answer» C. no current can leave the junction without some current entering it
Discussion
14.

Kirchhoff s law is not applicable to circuits with____________?
A. lumped parameters
B. passive elements
C. distributed parameters
D. non-linear resistances
Answer» D. non-linear resistances
Discussion
15.

If the energy is supplied from a source, whose resistance is 1 ohm, to a load of 100 ohms the source will be___________?
A. a voltage source
B. a current source
C. both of above
D. none of the above
Answer» B. a current source
Discussion
16.

For high efficiency of transfer of power, internal resistance of the source should be____________?
A. equal to the load resistance
B. less than the load resistance
C. more than the load resistance
D. none of the above
Answer» C. more than the load resistance
Discussion
17.

An ideal voltage source has__________?
A. zero internal resistance
B. open circuit voltage equal to the voltage on full load
C. terminal voltage in proportion to current
D. terminal voltage in proportion to load
Answer» B. open circuit voltage equal to the voltage on full load
Discussion
18.

Application of Norton’s theorem to a circuit yields:________________?
A. equivalent current source and impedance in parallel
B. equivalent current source and impedance in series
C. equivalent impedance
D. equivalent current source
Answer» B. equivalent current source and impedance in series
Discussion
19.

An ideal voltage source should have______________?
A. large value of e.m.f.
B. small value of e.m.f.
C. zero source resistance
D. infinite source resistance
Answer» D. infinite source resistance
Discussion
20.

Which of the following is non-linear circuit parameter?
A. Inductance
B. Condenser
C. Wire wound resistor
D. Transistor
Answer» E.
Discussion
21.

For maximum transfer of power, internal resistance of the source should be_____________?
A. equal to load resistance
B. less than the load resistance
C. greater than the load resistance
D. none of the above
Answer» B. less than the load resistance
Discussion
22.

The resistance LM will be____________?
A. 6.66 Q
B. 12 Q
C. 18Q
D. 20Q
Answer» B. 12 Q
Discussion
23.

Millman’s theorem yields____________?
A. equivalent resistance
B. equivalent impedance
C. equivalent voltage source
D. equivalent voltage or current source
Answer» E.
Discussion
24.

Kirchhoffs current law is applicable to only
A. junction in a network
B. closed loops in a network
C. electric circuits
D. electronic circuits
Answer» B. closed loops in a network
Discussion
25.

Thevenin resistance Rth is found
A. by removing voltage sources along with their internal resistances
B. by short-circuiting the given two terminals
C. between any two ‘open’ terminals
D. between same open terminals as for Etk
Answer» E.
Discussion
26.

Efficiency of power transfer when maximum transfer of power c xerosis
A. 100%
B. 80%
C. 75%
D. 50%
Answer» E.
Discussion
27.

A network which contains one or more than one source of e.m.f. is known as___________?
A. linear network
B. non-linear network
C. passive network
D. active network
Answer» E.
Discussion
28.

A star circuit has element of resistance R/2. The equivalent delta elements will be_____________?
A. R/6
B. fi?
C. 2R
D. 4R
Answer» C. 2R
Discussion
29.

The circuit has resistors, capacitors and semi-conductor diodes. The circuit will be known as___________?
A. non-linear circuit
B. linear circuit
C. bilateral circuit
D. none of the above
Answer» B. linear circuit
Discussion
30.

The number of independent equations to solve a network is equal to_____________?
A. the number of chords
B. the number of branches
C. sum of the number of branches and chords
D. sum of number of branches, chords and nodes
Answer» B. the number of branches
Discussion
31.

Which of the following is the passive element?
A. Capacitance
B. Ideal current source
C. Ideal voltage source
D. All of the above
Answer» B. Ideal current source
Discussion
32.

Kirchhoff s voltage law applies to circuits with____________?
A. nonlinear elements only
B. linear elements only
C. linear, non-linear, active and passive elements
D. linear, non-linear, active, passive, time varying as wells as time-in-variant elements
Answer» E.
Discussion
33.

A closed path made by several branches of the network is known as____________?
A. branch
B. loop
C. circuit
D. junction
Answer» C. circuit
Discussion
34.

A non-linear network does not satisfy__________?
A. superposition condition
B. homogeneity condition
C. both homogeneity as well as superposition condition
D. homogeneity, superposition and associative condition
Answer» D. homogeneity, superposition and associative condition
Discussion
35.

If resistance across LM in Fig. 2.30 is 15 ohms, the value of R is____________?
A. 10 Q
B. 20 Q
C. 30 Q
D. 40 Q
Answer» D. 40 Q
Discussion
36.

The circuit whose properties are same in either direction is known as__________?
A. unilateral circuit
B. bilateral circuit
C. irreversible circuit
D. reversible circuit
Answer» C. irreversible circuit
Discussion
37.

A terminal where three on more branches meet is known as______________?
A. node
B. terminus
C. combination
D. anode
Answer» B. terminus
Discussion
38.

In Thevenin’s theorem, to find Z
A. all independent current sources are short circuited and independent voltage sources are open circuited
B. all independent voltage sources are open circuited and all independent current sources are short circuited
C. all independent voltage and current sources are short circuited
D. all independent voltage sources are short circuited and all independent current sources are open circuited
Answer» E.
Discussion
39.

The superposition theorem requires as many circuits to be solved as there are____________?
A. sources, nodes and meshes
B. sources and nodes
C. sources
D. nodes
Answer» D. nodes
Discussion
40.

To determine the polarity of the voltage drop across a resistor, it is necessary to know___________?
A. value of current through the resistor
B. direction of current through the resistor
C. value of resistor
D. e.m.fs. in the circuit
Answer» C. value of resistor
Discussion
41.

“Any number of current sources in parallel may be replaced by a single current source whose current is the algebraic sum of individual source currents and source resistance is the parallel combination of individual source resistances”. This statement is associated with:
A. Thevenin’s theorem
B. Millman’s theorem
C. Maximum power transfer theorem
D. None of the above
Answer» C. Maximum power transfer theorem
Discussion
42.

“In any network containing more than one sources of e.m.f. the current in any branch is the algebraic sum of a number of individual fictitious currents (the number being equal to the number of sources of e.m.f.), each of which is due to separate action of each source of e.m.f., taken in order, when the remaining sources of e.m.f. are replaced by conductors, the resistances of which are equal to the internal resistances of the respective sources”. The above statement is associated with:
A. Thevenin’s theorem
B. Norton’s theorem
C. Superposition theorem
D. None of the above
Answer» D. None of the above
Discussion
43.

While calculating Rth in Thevenin’s theorem and Norton equivalent
A. all independent sources are made dead
B. only current sources are made dead
C. only voltage sources are made dead
D. all voltage and current sources are made dead
Answer» B. only current sources are made dead
Discussion
44.

Superposition theorem can be applied only to circuits having____________?
A. resistive elements
B. passive elements
C. non-linear elements
D. linear bilateral elements
Answer» E.
Discussion
45.

“In any linear bilateral network, if a source of e.m.f. E in any branch produces a current I in any other branch, then same e.m.f. acting in the second branch would produce the same current / in the first branch”.
The above statement is associated with
A. compensation theorem
B. superposition theorem
C. reciprocity theorem
D. none of the above
Answer» D. none of the above
Discussion
46.

Kirchhoffs voltage law is related to_____________?
A. junction currents
B. battery e.m.fs.
C. IR drops
D. both B. and C.
E. none of the above
Answer» E. none of the above
Discussion