Basic Electrical Engineering MCQ Questions & Answers

Basic Electrical Engineering MCQs : This section focuses on the "Basic Electrical Engineering". These Multiple Choice Questions (MCQs) should be practiced to improve the Basic Electrical Engineering skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

Which of the following type of circuits in electrical engineering cannot be analyzed using Ohm’s law?

A. Unilateral

B. Bilateral

C. Linear

D. Conductors

Question 2

What will be the current density of metal if a current of 30A is passed through a cross-sectional area of 0.5m2?

A. 7.5 A/m2

B. 15 A/m2

C. 60 A/m2

D. 160 A/m2

Question 3

What kind of quantity is an Electric potential?

A. Vector quantity

B. Tensor quantity

C. Scalar quantity

D. Dimensionless quantity

Question 4

How will the drift velocity of electrons change with the electric field?

A. Increases with increase in the electric field

B. Decreases with increase in the electric field

C. Remains same with a decrease in the electric field

D. Increases with a decrease in the electric field

Question 5

Which of the following is correct about direct current?

A. Magnitude is constant

B. Frequency is zero

C. Can be transported to larger distances with less loss in power

D. Flows in one direction

Question 6

According to the fundamentals of electrical engineering, which of these is a correct representation of peak value in an AC Circuit?

A. RMS value/Peak factor

B. RMS value*Form factor

C. RMS value/Form factor

D. RMS value*Peak factor

Question 7

Which of the following according is correct about electrical conductivity?

A. It is the ratio of current density to the electric field

B. It is the product of current density and electric field

C. It is the ratio of the electric field to current density

D. It is the reciprocal of the product of current density and electric field

Question 8

Which of the following is a correct representation of average value in an AC Circuit?

A. RMS value/Form factor

B. RMS value*Form factor

C. RMS value/Peak factor

D. RMS value*Peak factor

Question 9

Who defined electric current and devised a method to measure current?

A. Michael Faraday

B. Andre-Marie Ampere

C. Nikola Tesla

D. Alessandro Antonio Volta

Question 10

What will be the direction of the drift velocity of electrons change with respect to the electric field?

A. same as that of electric field

B. opposite to that of electric field

C. perpendicular to that of the electric field in positive direction

D. perpendicular to that of the electric field in negative direction

Question 11

What does positive power in an electrical element indicate in the fundamentals of electrical energy?

A. Element is absorbing power

B. Element is supplying power

C. Element may absorb or supply power

D. Element is neither absorbing nor supplying power

Question 12

Which of the following elements of electrical engineering cannot be analyzed using Ohm’s law?

A. Capacitors

B. Inductors

C. Transistors

D. Resistance

Question 13

In the fundamentals of electrical engineering, what do crowded lines of force indicate?

A. Strong electric field

B. Weak electric field

C. Strong electric potential

D. Weak electric potential

Question 14

Which of these will happen in a transformer when the number of secondary turns is less than the number of primary turns?

A. The voltage gets stepped up

B. The voltage gets stepped down

C. The power gets stepped up

D. The power gets stepped down

Question 15

What is the equivalent resistance of the primary of a transformer with a voltage transformation ratio of 10 and primary resistance of 0.05Ω when referred to secondary?

A. 0.005

B. 0.5

C. 5

D. 50

Question 16

In fundamentals of electrical engineering, what current is drawn by the primary circuit of an ideal transformer when the secondary is open?

A. Secondary current

B. Leakage current

C. Magnetizing current

D. Working current

Question 17

What is the number of primary turns in a 200/1000 V transformer if the emf per turn is 10V?

A. 5

B. 10

C. 20

D. 40

Question 18

Which of these according to fundaments of electrical energy is correct about alternating current?

A. Frequency is zero

B. Magnitude changes with time

C. Can be transported to larger distances with less loss in power

D. Flows in both directions

Question 19

Which of the following according to the fundamentals of electrical engineering is correct about the induced emf in primary of transformer?

A. It is the ratio of primary turns to emf induced per turn

B. It is the product of primary turns and emf induced per turn

C. It is the ratio of secondary turns to emf induced per turn

D. It is the product of secondary turns and emf induced per turn

Question 20

Which of the following according to KVL in Fundamentals of electrical engineering must be zero?

A. Algebraic sum of currents in closed-loop

B. Algebraic sum of power in closed-loop

C. Algebraic sum of losses in closed-loop

D. Algebraic sum of voltages in closed-loop

Question 21

Who witnessed the effect of magnetism for the first time?

A. Hans Christian Orsted

B. Alexander Graham Bell

C. Michael Faraday

D. Gustav Robert Kirchhoff

Question 22

What is the magnitude of mutually induced emf, E2 in a transformer?

A. directly proportional to rate of change of flux and number of secondary turns

B. inversely proportional to rate of change of flux and number of secondary turns

C. proportional to rate of change of flux and inversely proportional to number of secondary turns

D. inversely proportional to rate of change of flux and proportional to number of secondary turns

Question 23

Which of the following is correct about the voltage transformation ratio in electrical engineering?

A. Ratio of number of primary turns to the number of secondary turns

B. Ratio of induced emf in secondary to induced emf in primary

C. Ratio of secondary current to the primary current

D. Ratio of power in primary to power in secondary

Question 24

According to electrical engineering, what is zero for a charged spherical shell?

A. Electrical potential outside the spherical shell

B. Electrical potential inside the spherical shell

C. Electrical field outside the spherical shell

D. Electrical field inside the spherical shell

Question 25

Which of the following is correct about the power consumed by R1 and R2 connected in series if the value of R1 is greater than R2?

A. R1 will consume more power

B. R2 will consume more power

C. R1 and R2 will consume the same power

D. The relationship between the power consumed cannot be established

Question 26

What is the number of branches in a circuit with three nodes and three loops?

A. 4

B. 5

C. 6

D. 7

Question 27

What is responsible for the current to flow?

A. Protons

B. Electrons

C. Nucleus

D. Protons and Electrons

Question 28

What is the direction of the electric field at a point?

A. Along the line perpendicular to the electric field

B. Along the line tangent to the electric field

C. Electric field has no direction

D. Electric field has a random direction

Question 29

How many electrons will constitute 2 Coulombs of charge?

A. 6.24 * 10^18 electrons

B. 12.48 * 10^18 electrons

C. 1.602 * 10^19 electrons

D. 3.204 * 10^19 electrons

Question 30

Which of the following will happen in a transformer when the number of secondary turns is greater than the number of primary turns?

A. The voltage gets stepped up

B. The voltage gets stepped down

C. The power gets stepped up

D. The power gets stepped down

Question 31

Which of the following according to KCL must be zero?

A. Algebraic sum of currents in closed-loop

B. Algebraic sum of power in closed-loop

C. Algebraic sum of currents entering and leaving a junction

D. Algebraic sum of voltages across the input and output

Question 32

How many cycles will an AC signal make in 2 seconds if its frequency is 100 Hz?

A. 50

B. 100

C. 150

D. 200

Question 33

How many directions can the electric field at a point have?

A. 0

B. 1

C. 2

D. many

Question 34

How does induce emf in DC motor react to supply voltage?

A. It will aid the supply voltage

B. It will be double the supply voltage

C. It will oppose the supply voltage

D. It will be half of the supply voltage

Question 35

What is constant for a charged spherical shell according to basic electrical energy?

A. Electrical potential outside the spherical shell

B. Electrical potential inside the spherical shell

C. Electrical field outside the spherical shell

D. Electrical field inside the spherical shell

Question 36

Where does electro-static shielding occur in a charged spherical shell?

A. When electrical potential outside spherical shell is zero

B. When electrical potential inside the spherical shell is zero

C. When electrical field outside the spherical shell

D. Electrical field inside the spherical shell