The potential difference between point A & B is
|
(a) |
(b) |
(c) |
(d) 0 |
The potential difference between point A & B is
|
(a) |
(b) |
(c) |
(d) 0 |
(d) 0
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The radius of the orbital of electron in the hydrogen atom 0.5 Å. The speed of the electron is 2
. Then the current in the loop due to the motion of the electron is
|
(a) 1 mA |
(b) 1.5 mA |
(c) 2.5 mA |
(d) 1.5 |
Three equal charges are placed on the three corners of a square. If the force between
and
is
and that between
and
is
, the ratio of magnitudes
is
|
(a) 1/2 |
(b) 2 |
(c) 1/ |
(d) |
A convex mirror has a focal length f. A real object is placed at a distance f in front of it from the pole produces an image at
|
(a) Infinity |
(b) f |
(c) f/2 |
(d) 2f |
Absolute refractive indices of glass and water are
and
. The ratio of velocity of light in glass and water will be
|
(a) 4 : 3 |
(b) 8 : 7 |
(c) 8 : 9 |
(d) 3 : 4 |