Examdeva – Electrical Engineering MCQs

Question 1

On which of the following factors does the resistivity of a material depend ?

Accepted Answer

D. All of the above

Answer

A. Resistance of the conductor

Answer

B. Area of the conductor section

Answer

C. Length of the conductor

Question 2

Piezoelectric materials serve as a source of ________ .

Accepted Answer

D. Ultrasonic waves

Answer

A. Resonant waves

Answer

B. Musical waves

Answer

C. Microwaves

Question 3

The tiny block formed by the arrangement of a small group of atoms is called the

Accepted Answer

A. Unit cell

Answer

B. Space lattice

Answer

C. Either A or B

Answer

D. None of the above

Question 4

The number of atoms per unit cell in B.C.C. structure is

Accepted Answer

B. 2

Answer

A. 1

Answer

C. 4

Answer

D. 8

Question 5

Which of the following variety of copper has the best conductivity ?

Accepted Answer

C. Pure annealed copper

Answer

A. Induction hardened copper

Answer

B. Hard drawn copper

Answer

D. Copper containing traces of silicon

Question 6

The kinetic energy of a bounded electron is

Accepted Answer

A. Less than that of unbounded electron

Answer

B. Greater than that of unbounded electron

Answer

C. Equal to that of unbounded electron

Answer

D. Infinite

Question 7

Super conductivity can be destroyed by

Accepted Answer

C. Application of magnetic field

Answer

A. Adding impurities

Answer

B. Reducing temperatures

Answer

D. Any of the above

Question 8

The conductivity of a conductor can be increased by

Accepted Answer

A. Decreasing its temperature

Answer

B. Increasing its temperature

Answer

C. Decreasing its vibration

Answer

D. Increasing its vibration

Question 9

Mercury as an electric contact material is

Accepted Answer

C. A metal liquid

Answer

A. A liquid

Answer

B. A metal

Answer

D. A gas

Question 10

________ has the best damping properties.

Accepted Answer

D. Cast iron

Answer

A. Diamond

Answer

B. High speed steel

Answer

C. Mild steel

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