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Magnetism and Electromagnetism - Interview Questions and Answers

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16. The main constituent of permalloy is
A. cobalt
B. chromium
C. nickel
D. tungsten
Explanation:
17. 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 the above
Explanation:
18. A magnetic field exists around
A. iron
B. copper
C. aluminium
D. moving charges
Explanation:
19. The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields
A. meter is surrounded by strong magnetic fields
B. a soft iron shielding is used
C. a plastic shielding is provided
D. a shielding of anon-magnetic material is used
Explanation:
20. The relative permeability is less than unity is case of
A. ferromagnetic materials
B. ferrites
C. non-ferrous materials
D. diamagnetic materials
Explanation:
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