- AC
- BC/ m
- CC/ m2
- DC/ m3
Explanation:
Surface charge density means how much charge is stored in the unit surface area of a conductor.
So, it’s unit will be$=\frac{\text{the unit of the charge}}{\text{the unit of area}}$. In SI the unit of charge is Coulomb and the unit of area is m2.
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If the energy released in the fission of one nucleus is 200 MeV. Then the number of nuclei required per second in a power plant of 16 kW will be
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(a) 0.5 |
(b) 0.5 |
(c) 5 |
(d) 5 |
A transparent cube of 15 cm edge contains a small air bubble. Its apparent depth when viewed through one face is 6 cm and when viewed through the opposite face is 4 cm. Then the refractive index of the material of the cube is
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(a) 2.0 |
(b) 2.5 |
(c) 1.6 |
(d) 1.5 |
Speed of recession of galaxy is proportional to it's distance
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(a) Directly |
(b) Inversely |
(c) Exponentially |
(d) None of these |
Which of the following is true
|
(a) Lyman series is a continuous spectrum |
|
(b) Paschen series is a line spectrum in the infrared |
|
(c) Balmer series is a line spectrum in the ultraviolet |
|
(d) The spectral series formula can be derived from the Rutherford model of the hydrogen atom |