A 50 ohm galvanometer gets full scale deflection when a current of 0.01 A passes through the coil. When it is converted to a 10 A ammeter, the shunt resistance is
|
(a) 0.01 W |
(b) 0.05 W |
(c) 2000 W |
(d) 5000 W |
(b) 0.05 W
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Huygen's conception of secondary waves
|
(a) Allow us to find the focal length of a thick lens |
|
(b) Is a geometrical method to find a wavefront |
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(c) Is used to determine the velocity of light |
|
(d) Is used to explain polarisation |
The curve drawn between velocity and frequency of photon in vacuum will be a
|
(a) Straight line parallel to frequency axis |
|
(b) Straight line parallel to velocity axis |
|
(c) Straight line passing through origin and making an angle of 45o with frequency axis |
|
(d) Hyperbola |
A thin convex lens of focal length 10 cm is placed in contact with a concave lens of same material and of same focal length. The focal length of combination will be
|
(a) Zero |
(b) Infinity |
(c) 10 cm |
(d) 20 cm |
The rays of different colours fail to converge at a point after going through a converging lens. This defect is called:
Whenever light travels from denser medium to a rarer medium:
If convex lens of focal length 80cm and a concave lens of focal length 50 cm are combined together, what will be their resulting power
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(a) + 6.5 D |
(b) – 6.5 D |
(c) + 7.5 D |
(d) – 0.75 D |
The solar constant on the surface of the earth is S. What will be its value on the surface of another planet which is about 5.3 A.U. away from sun
|
(a) |
(b) |
(c) 5.3 S |
(d) (5.3)2 S |
