Photon and electron are given same energy (
. Wavelength associated with photon and electron are 
and 
then correct statement will be
|
(a) |
(b) |
(c) |
(d) |
(a)
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If each of the resistance of the network shown in the figure is R, the equivalent resistance between A and B is
|
(a) 5 R |
(b) 3 R |
(c) R |
(d) R/2 |
A diver at a depth of 12m in water (μ = 4/3) sees the sky in a cone of semi-vertical angle
|
(a) |
(b) |
(c) |
(d) 90° |
A particle of mass m and charge q is placed at rest in a uniform electric field E and then released. The kinetic energy attained by the particle after moving a distance y is
|
(a) |
(b) |
(c) qEy |
(d ) |
A spectral line λ = 5000 Å in the light coming from a distant star is observed as a 5200 Å. What will be recession velocity of the star
|
(a) 1.15 |
(b) 1.15 |
(c) 1.15 |
(d) 1.15 km/sec |
A table tennis ball which has been covered with conducting paint is suspended by a silk thread so that it hang between two plates, out of which one is earthed and other is connected to a high voltage generator. This ball
|
(a) Is attracted towards high voltage plate and stays there |
|
(b) Hangs without moving |
|
(c) Swing backward and forward hitting each plate in turn |
|
(d) Is attracted to earthed plate and stays there |
The angle of polarisation for any medium is 60o, what will be critical angle for this
(a)  
|
(b) 
|
(c) |
(d) |
A piece of semiconductor is connected in series in an electric circuit. On increasing the temperature, the current in the circuit will
| (a) Decrease | (b) Remain unchanged | (c) Increase | (d) Stop flowing |
