- AStainless steel.
- BGraphite.
- CCadmium.
- DPlutonium.
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In general, metallic ropes are suspended on the carriers which take inflammable material. The reason is
|
(a) There speed is controlled |
|
(b) To keep the centre of gravity of the carrier nearer to the earth |
|
(c) To keep the body of the carrier in contact with the earth |
|
(d) Nothing should be placed under the carrier |
Lenz's law gives
|
(a) The magnitude of the induced e.m.f. |
|
(b) The direction of the induced current |
|
(c) Both the magnitude and direction of the induced current |
|
(d) The magnitude of the induced current |

The specific resistance of a wire is ρ, its volume is 3
and its resistance is 3 ohms, then its length will be
|
(a) |
(b) |
(c) |
(d) |
The voltage gain of the following amplifier is

|
(a) 10 |
(b) 100 |
(c) 1000 |
(d) 9.9 |
The principle of controlled chain reaction is used in
| (a) Atomic energy reactor | (b) Atom bomb |
|
(c) The core of sun |
(d) Artificial radioactivity |