<h1 class=”banner-heading”>Magnetism and Electromagnetism Mcqs</h1>
This set of Electrical engineering Multiple Choice Questions & Answers (MCQs) focuses on study of “Magnetism and Electromagnetism”. These questions are chosen from a collection of most authoritative and best reference books on Electrical engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our Mcqs to assimilate Magnetism and Electromagnetism comprehensively.
32. When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle?
Will be zero
Will be infinite
Will depend on the amount of e.m.f. applied
Will depend on the radius of the circle
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
33. A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be____________?
240 N
24 N
2.4 N
0.24 N
34. The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength ?
2500 AT/m
250 AT/m
25 AT/m
2.5 AT/m
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
35. Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be_____________?
100 N
10 N
1 N
0.1 N
36. A 200 turn coil having an axial length of 30 mm and a radius of 10 mm is pivoted in a magnetic field having a flux density of 0.8 T. If the coil carries a current of 0.5 A, the torque acting on the coil will be_____________?
8 N-m
0.48 N-m
0.048 N-m
0.0048 N-m
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
37. A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ?
63.38 N/Wb
633.8 N/Wb
6338 N/Wb
63380 N/Wb
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
38. Unit for quantity of electricity is_____________?
Ampere-hour
Watt
Joule
Coulomb
39. What is the magnitude and the direction of force per 1.1m length of a pair of conductors of a direct current linecarrying 10 amperes and spaced 100 mm apart ?
22 x 10″8 N
22 x 10″7 N
22 x 10-6 N
22 x 10″5 N
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
40. The unit of flux is the same as that of_______________?
Reluctance
Resistance
Permeance
Pole strength
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
41. The commonly used material for shielding or screening magnetism is____________?
Copper
Aluminium
Soft iron
Brass
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
42. The Biot-savart’s law is a general modification of_______________?
Kirchhoffs law
Lenz’s law
Ampere’s law
Faraday’s laws
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
43. If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity?
Less than that of disc but in opposite direction
Equal to that of disc and in the same direction
Equal to that of disc and in the opposite direction
Less than that of disc and in the same direction
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
44. What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200 ?
2
4
6
8
45. The materials are a bit inferior conductors of magnetic flux than air
Ferromagnetic
Paramagnetic
Diamagnetic
Dielectric
Answer & Solution
No Solution for this Answer..! Report or Discus this Question