Explanation:
More is the intensity of incident radiation, more is the umber of photons and thus more is the number of photo electrons emitted. This results in the increase in the photo-current.
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In an experiment of meter bridge, a null point is obtained at the centre of the bridge wire. When a resistance of 10 ohm is connected in one gap, the value of resistance in other gap is
|
(a) 10 Ω |
(b) 5 Ω |
(c) |
(d) 500 Ω |
Two infinite length wires carries currents 8A and 6A respectively and placed along X and Y-axis. Magnetic field at a point P(0, 0, d)m will be
|
(a) |
(b) |
(c) |
(d) |
An ellipsometer is an instrument for.
Lenz's law is consequence of the law of conservation of
|
(a) Charge |
(b) Momentum |
(c) Mass |
(d) Energy |
The earth’s magnetic field at a given point is 0.5 
. This field is to be annulled by magnetic induction at the center of a circular conducting loop of radius 5.0cm. The current required to be flown in the loop is nearly
|
(a) 0.2 A |
(b) 0.4A |
(c) 4A |
(d) 40A |
In a fission reaction 
, the binding energy per nucleon of X and Y is 8.5 MeV whereas of 
is 7.6 MeV. The total energy liberated will be about
|
(a) 200 KeV |
(b) 2 MeV |
(c) 200 MeV |
(d) 2000 MeV |
