- ACharge, which is a fraction of charge on an electron, is not possible.
- BA charge cannot be destroyed.
- CCharge exists on particles.
- DThere exists a minimum permissible charge on a particle.
Explanation:
The quantisation of charge means that when we say something has some charge, we mean by that that how many times the charge of electrons it has. Because the whole charge is associated with an electron.
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The focal length of a convex lens is 10 cm and its refractive index is 1.5. If the radius of curvature of one surface is 7.5 cm, the radius of curvature of the second surface will be
|
(a) 7.5 cm |
(b) 15.0 cm |
(c) 75 cm |
(d) 5.0 cm |
A cell of internal resistance r is connected to an external resistance R. The current will be maximum in R, if
|
(a) R = r |
(b) R < r |
(c) R > r |
(d) R = r/2 |
A 36 W galvanometer is shunted by resistance of 4W. The percentage of the total current, which passes through the galvanometer is
|
(a) 8 % |
(b) 9 % |
(c) 10 % |
(d) 91 % |
