- AStore electrical energy.
- BBuild up high voltage of few million volts.
- CDecelerate charged particle like electrons.
- DBoth (a) and (b).
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The maximum distance upto which TV transmission from a TV tower of height h can be received is proportional to
|
(a) h1/2 |
(b) h |
(c) h3/2 |
(d) h2 |
Two magnets are held together in a vibration magnetometer and are allowed to oscillate in the earth's magnetic field with like poles together, 12 oscillations per minute are made but for unlike poles together only 4 oscillations per minute are executed. The ratio of their magnetic moments is
| (a) 3 : 1 | (b) 1 : 3 | (c) 3 : 5 | (d) 5 : 4 |
Four modifications are suggested in the lens formula to include the effect of the thickness t of the lens. Which one is likely to be correct?
As compared 12C atom, 14C atom has
|
(a) Two extra protons and two extra electrons |
|
(b) Two extra protons but no extra electrons |
|
(c) Two extra neutrons and no extra electrons |
|
(d) Two extra neutrons and two extra electrons |