Electromagnetics Field (3140912) MCQs

MCQs of Magnetic forces, materials and inductance

Showing 1 to 10 out of 171 Questions
1 2 3 4 5 6
1.
What are the force exists in an electromagnetic wave?
(a) Electrostatic force
(b) Magneto-static force
(c) Both (a) and (b)
(d) Neither (a) or (b)
Answer:

Option (c)

2.
The lines of force due to charged particles are
(a) Always straight
(b) Always curved
(c) sometimes curved
(d) None of above
Answer:

Option (b)

3.
Tesla is a unit of
(a) Field strength
(b) Inductance
(c) Flux density
(d) Flux
Answer:

Option (c)

4.
A permeable substance is one
(a) Which is a good conductor
(b) Which is a bad conductor
(c) Which is a strong magnet
(d) Through which the magnetic lines of force can pass very easily
Answer:

Option (d)

5.
The materials having low retentivity are suitable for making
(a) Weak magnets
(b) Temporary magnets
(c) Permanent magnets
(d) None of the above
Answer:

Option (b)

6.
A magnetic field exists around
(a) Iron
(b) Copper
(c) Aluminium
(d) Moving charges
Answer:

Option (d)

7.
Ferrites are materials
(a) Paramagnetic
(b) Diamagnetic
(c) Ferromagnetic
(d) none of above
Answer:

Option (c)

8.
Air gap has_______reluctance as compared to iron or steel path
(a) Little
(b) Lower
(c) Higher
(d) Zero
Answer:

Option (b)

9.
The direction of magnetic lines of force is
(a) From south pole to north pole
(b) From north pole to south pole
(c) From one end of the magnet to another
(d) None of above
Answer:

Option (b)

10.
Which of the following is a vector quantity ?
(a) Relative permeability
(b) Magnetic field intensity
(c) Magnetic field intensity
(d) Magnetic potential
Answer:

Option (b)

Showing 1 to 10 out of 171 Questions
1 2 3 4 5 6