- A8p × 107
- B4p × 106
- C2p × 105
- D$\pi$ × 104
Explanation:
Frequency of wave f = 40 × 106 Hz
Angular frequency, $\omega=2\pi\text{v}$
$\omega=2\pi\times40\times10^6$
$\Rightarrow\omega=8\pi\times10^7\frac{\text{rad}}{\text{s}}$
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If
what is the temperature of inversion
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(a) - |
(b) + |
(c) - |
(d) + |
The insulated spheres of radii and
having charges
and
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(a) No change in the energy of the system |
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(b) An increase in the energy of the system |
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(c) Always a decrease in the energy of the system |
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(d) A decrease in the energy of the system unless |
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(b) n |
(c) |
(d) |
The activity of a sample of a radioactive material is A, at time
and
at time
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(a) |
(d) |
(c) |
(d) |