If
what is the temperature of inversion
|
(a) - |
(b) + |
(c) - |
(d) + |
If
what is the temperature of inversion
|
(a) - |
(b) + |
(c) - |
(d) + |
(a) -
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When a body is earth connected, electrons from the earth flow into the body. This means the body is….
|
(a) Unchanged |
(b) Charged positively |
(c) Charged negatively |
(d) An insulator |
If the distance of the far point for a myopia patient is doubled, the focal length of the lens required to cure it will become
|
(a) Half |
(b) Double |
|
(c) The same but a convex lens |
(d) The same but a concave lens |
The wiring of a house has resistance 6Ω A 100 W bulb is glowing. If a geyser of 1000 W is switched on, the change in potential drop across the bulb is nearly
|
(a) Nil |
(b) 23 V |
(c) 32 V |
(d) 12 V |
Conditions of diffraction is
|
(a) |
(b) |
(c) |
(d) None of these |
A coil of inductance L is carrying a steady current i. What is the nature of its stored energy
|
(a) Magnetic |
(b) Electrical |
|
(c) Both magnetic and electrical |
(d) Heat |
Magnifying glass forms:
For a material, the refractive indices for red, violet and yellow colour light are respectively 1.52, 1.64 and 1.60. The dispersive power of the material is
|
(a) 2 |
(b) 0.45 |
(c) 0.2 |
(d) 0.045 |