The current in the adjoining circuit will be
|
(a) |
(b) |
(c) |
(d) |
The current in the adjoining circuit will be
|
(a) |
(b) |
(c) |
(d) |
(c)
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The rate of disintegration of fixed quantity of a radioactive element can be increased by
|
(a) Increasing the temperature |
(b) Increasing the pressure |
|
(c) Chemical reaction |
(d) It is not possible |
A thin glass (refractive index 1.5) lens has optical power of -5D in air. It's optical power in a liquid medium with refractive index 1.6 will be
|
(a) 25 D |
(b) – 25 D |
(c) 1 D |
(d) None of these |
When a positive q charge is taken from lower potential to a higher potential point, then its potential energy will
|
(a) Decrease |
(b) Increases |
(c) Remain unchanged |
(d) Become zero |
In producing X-rays a beam of electrons accelerated by a potential difference V is made to strike a metal target. For what value of V, X-rays will have the lowest wavelength of 0.3094 Å
| (a) 10 kV | (b) 20 kV | (c) 30 kV | (d) 40 kV |
The current is flowing in south direction along a power line. The direction of magnetic field above the power line (neglecting earth's field) is
|
(a) South |
(b) East |
(c) North |
(d) West |