MCQ
Which one of the following is inorganic compound semiconductor?
- AC
- BSi
- CGe
- ✓GaAs
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The magnetic moment of a circular coil carrying current is
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(a) Directly proportional to the length of the wire in the coil |
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(b) Inversely proportional to the length of the wire in the coil |
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(c) Directly proportional to the square of the length of the wire in the coil |
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(d) Inversely proportional to the square of the length of the wire in the coil |
For a given temperature difference, which of the following pairs will generate maximum thermo e.m.f.
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(a) Antimony-bismuth |
(b) Silver-gold |
(c) Iron-copper |
(d) Lead-nickel |
Cathode rays are similar to visible light rays in that
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(a) They both can be deflected by electric and magnetic fields |
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(b) They both have a definite magnitude of wavelength |
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(b) They both have a definite magnitude of wavelength |
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(d) They both can expose a photographic plate |