- ANuclei will break down.
- BElectrons do not remain in orbit.
- COrbiting electrons radiate energy.
- DElectrons are repelled by the nucleus.
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In a hydrogen atom, the distance between the electron and proton is 2.5
. The electrical force of attraction between them will be
|
(a) 2.8 |
(b) 3.7 |
(c) 6.2 |
(d) 9.1 |
A glass rod rubbed with silk is used to charge a gold leaf electroscope and the leaves are observed to diverge. The electroscope thus charged is exposed to X-rays for a short period. Then
|
(a) The divergence of leaves will not be affected |
|
(b) The leaves will diverge further |
|
(c) The leaves will collapse |
|
(d) The leaves will melt |
Which of the following will produce greater chromatic aberration?
A charged particle of mass 0.003 gm is held stationary in space by placing it in a downward direction of electric field of 6
. Then the magnitude of the charge is
|
(a) 5 |
(b) 5 |
(c) -18 |
(d) -5 |