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 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 |
(b) 1 W
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In human eye the focussing is done by
|
(a) To and fro movement of eye lens |
|
(b) To and fro movement of the retina |
|
(c) Change in the convexity of the lens surface |
|
(d) Change in the refractive index of the eye fluids |
An electron in the n = 1 orbit of hydrogen atom is bound by 13.6 eV. If a hydrogen atom is in the n = 3 state, how much energy is required to ionize it
|
(a) 13.6 eV |
(b) 4.53 eV |
(c) 3.4 eV |
(d) 1.51 eV |
The lowest frequency of light that will cause the emission of photoelectrons from the surface of a metal (for which work function is 1.65 eV) will be
|
(a) 4 |
(b) 4 |
(c) 4 |
(d) 4 |