Magnetism And Electromagnetism MCQ Questions & Answers | Electrical Engineering Page-5 section-1

41.
The magnetic materials exhibit the property of magnetisation because of

A. orbital motion of electrons

B. spin of electrons

C. spin of nucleus

D. either of these

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42.
A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be

A. M

B. $$\frac{{\text{M}}}{2}$$

C. 2 M

D. $$\frac{{\text{M}}}{4}$$

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43.
Main causes of noisy solenoid are

A. strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force

B. uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts

C. both of above

D. none of the above

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44.
The most effective and quickest may of making a magnet from soft iron is by

A. placing it inside a coil carrying current

B. induction

C. the use of permanent magnet

D. rubbing with another magnet

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45.
Gilbert is a unit of

A. electromotive force

B. magnetomotive force

C. conductance

D. permittivity

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46.
Which of the following is the unit of magnetic flux density?

A. Weber

B. Lumens

C. Tesla

D. None of the above

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47.
Indicate which of the following material does not retain magnetism permanently.

A. Soft iron

B. Stainless steel

C. Hardened steel

D. None of the above

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48.
The magnetomotive force is

A. the voltage across the two ends of exciting coil

B. the flow of an electric current

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

D. the passage of magnetic field through an exciting coil

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49.
The relative permeability is less than unity is case of

A. ferromagnetic materials

B. ferrites

C. non-ferrous materials

D. diamagnetic materials

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50.
A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be

A. Zero

B. BLI

C. B²LI

D. BLI²

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Magnetism And Electromagnetism MCQ Questions & Answers | Electrical Engineering

41. The magnetic materials exhibit the property of magnetisation because of

Answer & Solution

42. A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be

Answer & Solution

43. Main causes of noisy solenoid are

Answer & Solution

44. The most effective and quickest may of making a magnet from soft iron is by

Answer & Solution

45. Gilbert is a unit of

Answer & Solution

46. Which of the following is the unit of magnetic flux density?

Answer & Solution

47. Indicate which of the following material does not retain magnetism permanently.

Answer & Solution

48. The magnetomotive force is

Answer & Solution

49. The relative permeability is less than unity is case of

Answer & Solution

50. A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be

Answer & Solution

41.
The magnetic materials exhibit the property of magnetisation because of

42.
A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be

43.
Main causes of noisy solenoid are

44.
The most effective and quickest may of making a magnet from soft iron is by

45.
Gilbert is a unit of

46.
Which of the following is the unit of magnetic flux density?

47.
Indicate which of the following material does not retain magnetism permanently.

48.
The magnetomotive force is

49.
The relative permeability is less than unity is case of

50.
A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be