Nuclear fusion is common to the pair
| (a) Thermonuclear reactor, uranium based nuclear reactor |
| (b) Energy production in sun, uranium based nuclear reactor |
| (c) Energy production in sun, hydrogen bomb |
| (d) Disintegration of heavy nuclei, hydrogen bomb |
(c) Energy production in sun, hydrogen bomb
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If 10% of a radioactive material decays in 5 days, then the amount of original material left after 20 days is approximately
|
(a) 60% |
(b) 65% |
(c) 70% |
(d) 75% |
Figure shows the ray diagram of a:
Two capacitors of equal capacity are first connected in parallel and then in series. The ratio of the total capacities in the two cases will be
|
(a) 2 : 1 |
(b) 1 : 2 |
(c) 4 : 1 |
(d) 1 : 4 |
The sensitiveness of a moving coil galvanometer can be increased by decreasing
|
(a) The number of turns in the coil |
|
(b) The area of the coil |
|
(c) The magnetic field |
|
(d) The couple per unit twist of the suspension |