- AAttacks.
- BRepels.
- CBoth a and b.
- DNone.
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Which of the following is not a correct statement
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(a) The wavelength of red light is greater than the wavelength of green light |
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(b) The wavelength of blue light is smaller than the wavelength of orange light |
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(c) The frequency of green light is greater than the frequency of blue light |
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(d) The frequency of violet light is greater than the frequency of blue light |
The photoelectric threshold wavelength for a metal surface is 6600 Å. The work function for this is
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(a) 1.87 V |
(b) 1.87 eV |
(c) 18.7 eV |
(d) 0.18 eV |
Assertion : A metallic shield in form of a hollow shell may be built to block an electric field.
Reason : In a hollow spherical shield, the electric field inside it is zero at every point.
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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. |
Two resistors of resistance and
having
are connected in parallel. For equivalent resistance R, the correct statement is
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(a) |
(b) |
(c) |
(d) |
The momentum in mechanics is expressed as m × v. The analogous expression in electricity is
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(a) I × Q |
(b) I × V |
(c) L × I |
(d) L × Q |