- A1CV
- ✓$1CV^{-1}$
- C$1CV^{-2}$
- D1CV2
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Which of the following graphs shows the variation of electric field E due to a hollow spherical conductor of radius R as a function of distance from the centre of the sphere
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(a) |
(b) |
(c) |
(d) |
Hubble's law states that the velocity with which the 'milky way' is moving away from the earth is proportional to
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(a) Square of the distance of the milky way from the earth |
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(b) Distance of milky way from the earth |
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(c) Mass of the milky way |
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(d) Product of the mass of the milky way and its distance from the earth |
The spectrum of light emitted by a glowing solid is
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(a) Continuous spectrum |
(b) Line spectrum |
(c) Band spectrum |
(d) Absorption spectrum |
$\text{p}=\text{p}_0\sin(\text{kx}-\omega\text{t})$
$\text{p}=\text{p}_0\sin\text{kx}\cos\omega\text{t}$
$\text{p}=\text{p}_0\cos\text{kx}\sin\omega\text{t}$
$\text{p}=\sum\text{p}_{0\text{n}}\sin(\text{k}_\text{n}\text{x}-\omega_\text{n}\text{t}).$
Water boils in an electric kettle in 15 minutes after switching on. If the length of the heating wire is decreased to 2/3 of its initial value, then the same amount of water will boil with the same supply voltage in
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(a) 15 minutes |
(b) 12 minutes |
(c) 10 minutes |
(d) 8 minutes |
If fa and ff represent the carrier wave frequencies for amplitude and frequency modulations respectively, then
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(a) |
(b) |
(c) |
(d) |
Light is incident normally on a diffraction grating through which the first order diffraction is seen at 32o. The second order diffraction will be seen at
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(a) 48o |
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(b) 64o |
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(c) 80o
|
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(d) There is no second order diffraction in this case |
The distance between the two charges 25μC and 36μC is 11 cm At what point on the line joining the two, the intensity will be zero
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(a) At a distance of 5 cm from 25 μC |
(b) At a distance of 5 cm from 36 μC |
|
(c) At a distance of 10 cm from 25 μC |
(d) At a distance of 11 cm from 36 μC |