Magnetism & Electromagnetism Mcqs Start Creating PDF

MCQ: Magnetism of a magnet can be destroyed by_____________?

1. heating
2. hammering
3. by inductive action of another magnet
4. by all above methods

MCQ: Main causes of noisy solenoid are______________?

1. strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force
2. uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts
3. both of above
4. none of the above

MCQ: Core of an electromagnet should have____________?

1. low coercivity
2. high susceptibility
3. both of the above
4. none of the above

MCQ: For which of the following materials the net magnetic moment should be zero ?

1. Diamagnetic materials
2. Ferrimagnetic materials
3. Antiferromagnetic materials
4. Antiferrimagnetic materials

MCQ: Temporary magnets are used in______________?

1. loud-speakers
2. generators
3. motors
4. all of the above

MCQ: The susceptibility of paramagnetic materials generally lies between____________?

1. KT3 and 1CT6
2. 1CT3 and 1CT7
3. KT4 and KT8
4. 10″2 and KT5

MCQ: The attraction capacity of electromagnet will increase if the_______________?

1. core length increases i
2. core area increases
3. flux density decreases
4. flux density increases

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

1. Ferromagnetic materials
2. Paramagnetic materials
3. Diamagnetic materials
4. Ferrites

MCQ: Which of the following materials are diamagnetic ?

1. Silver
2. Copper
3. Silver and copper
4. Iron

MCQ: The stray line of magnetic flux is defined as_____________?

1. a line vertical to the flux lines
2. the mean length of a ring shaped coil
3. a line of magnetic flux in a non-uniform field
4. a line of magnetic flux which does not follow the designed path