A monochromatic beam of light passes from a denser medium into a rarer medium. As a result
|
(a) Its velocity increases |
(b) Its velocity decreases |
|
(c) Its frequency decreases |
(d) Its wavelength decreases |
(a) Its velocity increases
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Two sources of equal emf are connected to an external resistance R. The internal resistances of the two sources are 
and 
. If the potential difference across the source having internal resistance 
is zero, then
|
(a) |
(b) |
|
(c) |
(d) |
The resistances of a wire at temperatures t℃ and 0℃ are related by
|
(a) |
(b) |
(c) |
(d) |
A charge of magnitude 3e and mass 2m is moving in an electric field 
. The acceleration imparted to the charge is
|
(a) 2Ee/3m |
(b) 3Ee/2m |
(c) 2m/3Ee |
(d) 3m/2Ee |
For a normal eye, the least distance of distinct vision is
|
(a) 0.25 m |
(b) 0.50 m |
(c) 25 m |
(d) Infinite |
