A light ray is incident upon a prism in minimum deviation position and suffers a deviation of 34°. If the shaded half of the prism is knocked off, the ray will
|
(a) Suffer a deviation of 34° |
(b) Suffer a deviation of 68° |
|
(c) Suffer a deviation of 17° |
(d) Not come out of the prism |
(c) Suffer a deviation of 17°
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The resistance of a galvanometer is 50 ohms and the current required to give full scale deflection is 100μA. In order to convert it into an ammeter, reading upto 10A, it is necessary to put a resistance of
|
(a) 5 |
(b) 5 |
|
(c) |
(d) 99,950 |
When a potential difference is applied across the ends of a linear metallic conductor
|
(a) The free electrons are accelerated continuously from the lower potential end to the higher potential end of the conductor |
|
(b) The free electrons are accelerated continuously from the higher potential end to the lower potential end of the conductor |
|
(c) The free electrons acquire a constant drift velocity from the lower potential end to the higher potential end of the conductor |
|
(d) The free electrons are set in motion from their position of rest |
The distance CP is the:
A vertical wire kept in Z-X plane carries a current from Q to P (see figure). The magnetic field due to current will have the direction at the origin O along
|
(a) OX |
(b) |
(c) OY |
(d) |
Angle of a prism is 30° and its refractive index is 
and one of the surface is silvered. At what angle of incidence, a ray should be incident on one surface so that after reflection from the silvered surface, it retraces its path
|
(a) 30° |
(b) 60° |
(c) 45° |
(d) |
A beam of electrons and protons move parallel to each other in the same direction, then they
|
(a) Attract each other |
(b) Repel each other |
|
(c) No relation |
(d) Neither attract nor repel |
The 
X-ray emission line of tungsten occurs at λ = 0.021 nm. The energy difference between K and L levels in this atom is about
| (a) 0.51MeV | (b) 1.2 MeV | (c) 59 KeV | (d) 13.6 eV |
