Albedo is maximum for
|
(a) Pluto |
(b) Venus |
(c) Earth |
(d) Mercury |
Albedo is maximum for
|
(a) Pluto |
(b) Venus |
(c) Earth |
(d) Mercury |
(b) Venus
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Choose the correct statement
|
(a) When we heat a semiconductor its resistance increases |
|
(b) When we heat a semiconductor its resistance decreases |
|
(c) When we cool a semiconductor to 0 K then it becomes super conductor |
|
(d) Resistance of a semiconductor is independent of temperature |
A ray of light is incident at the glass–water interface at an angle i, it emerges finally parallel to the surface of water, then the value of would be
|
(a) (4/3) sin i |
(b) 1/sin i |
(c) 4/3 |
(d) 1 |
Two magnets A and B are identical and these are arranged as shown in the figure. Their length is negligible in comparison to the separation between them. A magnetic needle is placed between the magnets at point P which gets deflected through an angle θ under the influence of magnets. The ratio of distance
and
will be

|
(a) |
(b) |
(c) |
(d) |

If L is the coherence length and c the velocity of light, the coherent time is
|
(a) cL |
(b) |
(c) |
(d) |