Electrical Engineering Mcqs Practice Test

Question 1

Magnetic moment is a_____________?

Accepted Answer

D. vector quantity

Question 2

Hysteresis loop in case of magnetically hard materials is more in shape as compared to magnetically soft materials

Accepted Answer

C. rectangular

Question 3

A keeper is used to_____________?

Accepted Answer

D. provide a closed path for flux

Question 4

The uniform magnetic field is______________?

Accepted Answer

C. the field in which all lines of magnetic flux are parallel and equidistant

Question 5

The change of cross-sectional area of conductor in magnetic field will affect______________?

Accepted Answer

C. A. and B. both in the same way

Question 6

The magneto-motive force is______________?

Accepted Answer

C. the sum of all currents embraced by one line of magnetic field

Question 7

A certain amount of current flows through a ring-shaped coil with fixed number of turns. How does the magnetic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil ?

Accepted Answer

B. Increases

Question 8

What will be the magnetic potential difference across the air gap of 2 cm length in magnetic field of 200 AT/m ?

Accepted Answer

B. 4 AT

Question 9

The initial permeability of an iron rod is________________?

Accepted Answer

D. the permeability almost in non-magnetised state

Question 10

Which of the following statements is correct ?

Accepted Answer

D. The magnetic flux inside the exciting coil is same as on its outside surface

Question 11

The magnetic reluctance of a material______________?

Accepted Answer

A. decreases with increasing cross sectional area of material

Question 12

In a simple magnetic field the strength of magnet flux_______________?

Accepted Answer

D. first increases and then decreases till it becomes zero

Question 13

The bar magnet has____________?

Accepted Answer

A. the dipole moment

Question 14

How does the magnetic compass needle behave in a magnetic field ?

Accepted Answer

C. It assures a position which follows a line of magnetic flux

Question 15

Which of the following type of materials are not very important for engineering applications ?

Accepted Answer

C. Diamagnetic

Question 16

The stray line of magnetic flux is defined as_____________?

Accepted Answer

D. a line of magnetic flux which does not follow the designed path

Question 17

Which of the following materials are diamagnetic ?

Accepted Answer

C. Silver and copper

Question 18

For which of the following materials the saturation value is the highest ?

Accepted Answer

D. Ferrites

Question 19

The attraction capacity of electromagnet will increase if the_______________?

Accepted Answer

D. flux density increases

Question 20

The susceptibility of paramagnetic materials generally lies between____________?

Accepted Answer

A. KT3 and 1CT6