- AStopping potential
- BKinetic energy
- CWork function
- DNone of these
Explanation:
The minimum energy required to remove an electron is called is work funtion.
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A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves away from the lens on the other side on its principal axis, the intensity of light:
Assertion : An electron and proton enters a magnetic field with equal velocities, then, the force experienced by the proton will be more than electron.
Reason : The mass of proton is 1837 times more than electron.
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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 assertion is false but reason is true. |
Two identical conductors of copper and aluminium are placed in an identical electric fields. The magnitude of induced charge in the aluminium will be
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(a) Zero |
(b) Greater than in copper |
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(c) Equal to that in copper |
(d) Less than in copper |
When white light passes through the achromatic combination of prisms, then what is observed
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(a) Only deviation |
(b) Only dispersion |
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(c) Deviation and dispersion |
(d) None of the above |
If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material denoted by respectively then
|
(a) |
(b) |
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(c) |
(d) |
The time period of rotation of the sun is 25 days and its radius is 7
. The Doppler shift for the light of wavelength 6000 Å emitted from the surface of the sun will be
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(a) 0.04 Å |
(b) 0.40 Å |
(c) 4.00 Å |
(d) 40.0 Å |