mesons can be
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(a) |
(b) |
(c) |
(d) |
mesons can be
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(a) |
(b) |
(c) |
(d) |
(d)
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A ray of light is incident at an angle i from denser to rare medium. The reflected and the refracted rays are mutually perpendicular. The angle of reflection and the angle of refraction are respectively r and r’, then the critical angle will be
|
(a) |
(b) |
(c) |
(d) |

The ratio of thermionic currents (I/I0) for a metal when the temperature is slowly increased to T as shown in figure. (I and I0 are currents at T and respectively). Then which one is correct?
| (a) A | (b) B | (c) C | (d) D |
The refractive index of water with respect to air is 4 / 3 and the refractive index of glass with respect to air is 3/2. The refractive index of water with respect to glass is
|
(a) |
(b) |
(c) |
(d) 2 |
The equivalent resistance between the points P and Q in the network given here is equal to (given r = )
|
(a) |
(b) 1 W |
(c) |
(d) 2 W |
The materials suitable for making electromagnets should have
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(a) High retentivity and high coercivity |
(b) Low retentivity and low coercivity |
|
(c) High retentivity and low coercivity |
(d) Low retentivity and high coercivity |
A ray of light incident normally on an isosceles right angled prism travels as shown in the figure. The least value of the refractive index of the prism must be
|
(a) |
(b) |
(c) 1.5 |
(d) 2.0 |