MCQ Or Quiz On Elements Of Electrical Engineering

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Also read – Basic Electrical Questions And Answers.

Elements Of Electrical Engineering MCQ

01. Which is the SI unit of power?

1. henry
2. coulomb
3. watt
4. watt-hour

Ans: c

02. The electric pressure is known as?

1. resistance
2. power
3. voltage
4. energy

Ans: c

03. The substances which offer low resistance and have a large number of free electrons are called?

1. insulators
2. inductors
3. semi-conductors
4. conductors

Ans: d

04. Which is not a poor conductor?

1. Cast iron
2. Copper
3. Carbon
4. Tungsten

Ans: b

05. In the following option which is an insulating material?

1. Copper
2. Gold
3. Silver
4. Paper

Ans: d

06. The conductor allows current through it is which property?

1. resistance
2. reluctance
3. conductance
4. inductance

Ans: c

07. The reciprocal of conductance is?

1. resistance
2. inductance
3. reluctance
4. capacitance

Ans: a

08. In a conductor, the resistance varies inversely?

1. length
2. area of cross-section
3. temperature
4. resistivity

Ans: b

09. If the temperature raises then the resistance of pure metal?

1. increases
2. decreases
3. first increases and then decreases
4. remains constant

Ans: a

10. If the temperature raises then the resistance of semiconductor?

1. decreases
2. increases
3. first increases and then decreases
4. remains constant

Ans: a

11. If the three resistance are connected in parallels such as 15 ohms, 10 ohms, and 30 ohms. The total resistance of the circuit is?

1. 5 ohms
2. 10 ohms
3. 15 ohms
4. 55 ohms

Ans: You guys comment below if you do comment I really appreciate you.

12. The electric current is detected by which instrument?

1. voltmeter
2. rheostat
3. wattmeter
4. galvanometer

Ans: d

13. In a circuit, a resistor of 30-ohm carries a current of 2 amperes. The voltage across the resistor is?

1. 33 V
2. 60 v
3. 80 V
4. 132 V

Ans: b

14. The bulb draws 300 mA and the voltage across it is 240 V. The resistance of the electric bulb is?

1. 400 Ohm
2. 600 Ohm
3. 800 Ohm
4. 1000 Ohm

Ans: c

15. If the resistance of one branch is 18 ohms and the resistance of a parallel circuit consisting of two branches is 12 ohms, what is the resistance of the other?

1. 18 Q
2. 36 Q
3. 48 Q
4. 64 Q

Ans: b

16. Four wires of the same cross-sectional area, the same material, and the same length, when connected in parallel, give a resistance of 0.25 ohm. Then the same 4 wires if connected in series the resistance will be? 

1. 1 Q
2. 2 Q
3. 3 Q
4. 4 Q

Ans: Guys answer comment below.

17. The current of 16 amperes divides between two branches of the circuit in parallel of resistances 12 ohms and 8 ohms respectively. The current in each branch is?

1. 6.4 A, 6.9 A
2. 6.4 A, 9.6 A
3. 4.6 A, 6.9 A
4. 4.6 A, 9.6 A

Ans: b

18. The material which has a zero temperature coefficient of resistance?

1. Manganin
2. Porcelain
3. Carbon
4. Copper

Ans: a

19. Which statement is true both for a parallel and a series D.C. circuit?

1. Elements have individual currents
2. Currents are additive
3. Voltages are additive
4. Power is additive

Ans: d

20. The materials which have a negative temperature coefficient of resistance?

1. Copper
2. Aluminum
3. Carbon
4. Brass

Ans: c

21. The flow of a current in a conductor is due to the flow of?

• a. Protons
• b. Electrons and ions
• c. Charged particles
• d. Electrons

Ans is Electrons

22. The electric current is?

• a. The pressure difference between the two poles
• b. The random movement of electrons in a conductor
• c. Movement of free electrons predominately in one direction.
• d. The power that causes the drift of electrons

Ans is Movement of free electrons predominately in one direction

23. In the gases, the flow of current is due to?

• a. Positive ions and electrons
• b. Negative and positive ions
• c. Electrons only
• d. Electrons, positive ions, and negative ions

Ans is Electrons, positive ions, and negative ions

24. The ampere-second could be the unit of?

• a. EMF
• b. Charge
• c. Power
• d. Energy

Ans is Charge

25. The minimum requirements for causing the flow of current are?

• a. A power source and a bulb
• b. A voltage source and a conductor
• c. A voltage source, a conductor, an ammeter, and a switch
• d. A voltage source, a resistor, and a switch

Ans is A voltage source and a conductor

26. The current which is considered dangerous for the human body is?

• a. one milli-ampere
• b. 25 milli-ampere
• c. 50 milli-ampere
• d. 0.5 ampere

Ans is 50 milli-ampere

27. The voltage is a form of?

• a. Kinetic energy
• b. Potential energy
• c. Both
• d. None of the above

Ans is Potential energy

28. One volt is equal to?

• a. One coulomb per joule
• b. One joule per coulomb
• c. One coulomb per second
• d. Work was done in transferring a charge of one coulomb

Ans is One joule per coulomb

29. The electric pressure is also called the?

• a. Resistance
• b. Voltage
• c. Power
• d. Energy

Ans is Voltage

30. The ratio of voltage and electric current in a closed circuit?

• a. Remains constant
• b. Varies
• c. Increases
• d. Falls

Ans is Remains constant

31. If in a circuit the voltage is reduced to half and resistance is doubled, the current will become?

• a. Four times
• b. Double
• c. A quarter
• d. Half

Ans is A quarter

32. The condition for the validity under ohm’s law is that the?

• a. The temperature should remain constant
• b.  The current should be proportional to voltage
• c. Resistance must be wire wound type.
• d. All of the above

Ans is The temperature should remain constant

33. A linear resistor is one which obeys?

• a. Ampere’s law
• b. Lenz’s law
• c. Ohm’s law
• d. Kirchhoff’s law

Ans is Ohm’s law

34. The resistance of the conductor always increases if?

• a. Temperature is reduced
• b. Temperature is increased
• c. Number of free electrons available become less
• d. Number of free electrons available become more

Ans is Number of free electrons available become less

35. The resistance of the wire varies inversely?

• a. Area of x-section
• b. Length
• c. Resistivity
• d. Temperature

Ans is Area of x-section

36. The pure metal generally have?

• a. High conductivity and low-temperature coefficient
• b. High conductivity and large temperature coefficient
• c. Low conductivity and zero temperature coefficient
• d. Low conductivity and high-temperature coefficient

Ans is High conductivity and large temperature coefficient

37. Which of the following material possesses the least specific resistance?

• a. Aluminum
• b. Copper
• c. Silver
• d. Iron

Ans is Silver

38. With the rise in temperature, the resistance of carbon?

• a. Increases
• b. Decreases
• c.  It becomes zero
• d. Remains unchanged

Ans is Decreases

39. Which of the following quantities are the same in all parts of a series circuit?

• a. Voltage
• b. Power
• c. Current
• d. Resistance

Ans is Current

40. The element of electric heater is made of?

• a. Copper
• b. Aluminum
• c. Nichrome
• d. Carbon

Ans is Nichrome

I hope this article may help you all a lot.

Tags: Electrical Interview Question Related to Current And Electricity, Electrical Quiz Questions, MCQ Or Quiz On Current And Electricity, Electrical Objective Questions.