A light beam is being reflected by using two mirrors, as in a periscope used in submarines. If one of the mirrors rotates by an angle q, the reflected light will deviate from its original path by the angle
|
(a) 2θ |
(b) 0° |
(c) θ |
(d) 4θ |
(a) 2θ
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A group of bright and faint stars is called
|
(a) Galaxy |
(b) Comet |
(c) Black hole |
(d) Constellation |
The current in the given circuit is
|
(a) 8.31 A |
(b) 6.82 A |
(c) 4.92 A |
(d) 2 A |
If 200 MeV energy is released in the fission of a single 
nucleus, the number of fissions required per second to produce 1 kilowatt power shall be (Given 1eV = 1.6 
|
(a) 3.125 |
(b) 3.125 |
(c) 3.125 |
(d) 3.125 |
Assertion : Base in a transistor is made very thin as compared to collector and emitter regions.
Reason : Due to thin base power gain and voltage gain is obtained by a transistor.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
A hollow sphere of charge does not produce an electric field at any
|
(a) Point beyond 2 metres |
(b) Point beyond 10 metres |
|
(c) Interior point |
(d) Outer point |
A nucleus decays by 
emission followed by a gamma emission. If the atomic and mass numbers of the parent nucleus are Z and A respectively, the corresponding numbers for the daughter nucleus are respectively.
|
(a) Z - 1 and A - 1 |
(b) Z + 1 and A |
(c) Z - 1 and A |
(d) Z + 1 and A - 1 |
