MCQ
Resistivity of which of the following substance decrease on increasing the temperature?
- ACopper
- ✓Silicon
- CAluminium
- DNichrome
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A photon of 1.7
Joules is absorbed by a material under special circumstances. The correct statement is
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(a) Electrons of the atom of absorbed material will go the higher energy states |
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(b) Electron and positron pair will be created |
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(c) Only positron will be produced |
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(d) Photoelectric effect will occur and electron will be produced |
The magnitude of i in ampere unit is
|
(a) 0.1 |
(b) 0.3 |
(c) 0.6 |
(d) None of these |
The triode constant is out of the following
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(a) Plate resistance |
(b) Amplification factor |
(c) Mutual conductance |
(d) All the above |