- ASilver
- BMica
- CCopper
- DSilicon
Explanation:
The resistivities of semiconductors lie between 10-6 Ωm and 104 Ωm. A semiconductor material has an electrical conductivity value falling between that of a conductor, such as metallic aluminum, and an insulator, such as wood. Silicon and germanium are typical semiconductors.
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In order to pass 10% of main current through a moving coil galvanometer of 99 ohm, the resistance of the required shunt is
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(a) 9.9 Ω |
(b) 10 Ω |
(c) 11 Ω |
(d) 9 Ω |
According to de-Broglie, the de-Broglie wavelength for electron in an orbit of hydrogen atom is 10–9 m. The principle quantum number for this electron is
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(a) 1 |
(b) 2 |
(c) 3 |
(d) 4 |
What is the difference between soft and hard X-rays
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(a) Velocity |
(b) Intensity |
(c) Frequency |
(d) Polarization |
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(a) |
(b) |
(c) |
(d) |
A charge of 40 μC is given to a capacitor having capacitance C = 10 μF. The stored energy in ergs is
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(a) 80 |
(b) 800 |
(c) 80 |
(d) 8000 |