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Electrical Materials SSC JE Quiz 3

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Question 1

When a ferromagnetic substance is magnetized, ther ar small changes in dimensions.The phenomenon is called

Question 2

Match List-I with List-II and select the correct answer using the code given below the lists:
List-I
A) No eddy current loss
B) Small hysteresis loss
C) Large hysteresis loss
List-II
1) Ferrimagnetic material
2) Soft magnetic material
3) Hard magnetic material
4) non-ferrous material

Question 3

The current flow in a semiconductor is due to
1) Drift current
2) Displacement current
3) Diffusion current

Question 4

A semiconductor has a band gap of 2 eV. The wavelength of radiation emitted from the semiconductor when electrons and holes recombine is

Question 5

Tunnel diode is commonly used as which one of the following?
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