- AZero rest mass and zero spin
- BZero rest mass and half integral spin
- CZero rest mass and spin of unity
- DUnit rest mass and spin of unity
Explanation:
Rest mass of photon is zero because it is just a form of energy.
Spin of a photon is 1.
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Assertion : Light is produced in gases in the process of electric discharge through them at high pressure.
Reason : At high pressure electrons of gaseous atoms collide and reach and excited state.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
$\overrightarrow{\text{R}}=\frac{1}{\text{M}}\sum\limits_{\text{i}}\text{m}_\text{i}\overrightarrow{\text{r}}_\text{i}$
$\overrightarrow{\text{a}}_\text{cm}=\frac{\overrightarrow{\text{F}}}{\text{M}}$
Two condensers of capacity 0.3 μF and 0.6 μF respectively are connected in series. The combination is connected across a potential of 6 volts . The ratio of energies stored by the condensers will be
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(a) |
(b) 2 |
(c) |
(d) 4 |
Complete the reaction ![]()
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(a) |
(b) |
(c) |
(d) |