In a copper voltameter, mass deposited in 30 second is m gm. If the time-current graph is as shown in figure, ECE of copper is]
|
(a) m |
(b) m/2 |
(c) 0.1 m |
(d) 0.6 m |
(b) m/2
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An under water swimmer is at a depth of 12 m below the surface of water. A bird is at a height of 18 m from the surface of water, directly above his eyes. For the swimmer the bird appears to be at a distance from the surface of water equal to (Refractive Index of water is 4/3)
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(a) 24 m |
(b) 12 m |
(c) 18 m |
(d) 9 m |
The bluish colour of water in deep sea is due to:
In N-type semiconductors, majority charge carriers are
|
(a) Holes |
(b) Protons |
(c) Neutrons |
(d) Electrons |
Symbolic representation of photodiode is
|
(a)
|
(b)
|
(c)
|
(d)
|
