1 Curie is equal to
|
(a) 3 |
(b) 3.7 |
|
(c) 5 |
(d) 3.7 |
1 Curie is equal to
|
(a) 3 |
(b) 3.7 |
|
(c) 5 |
(d) 3.7 |
(d) 3.7
disintegrations/sec
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There is a current of 40 ampere in a wire of area of cross-section. If the number of free electron per
is
, then the drift velocity will be
|
(a) 1.25 × |
(b) 2.50 × |
(c) 25.0 × |
(d) 250 × |
A radioactive decay chain starts from and produces
by successive emissions. The emitted particles can be
| (a) Two a-particles and one b-particle |
|
(b) Three |
|
(c) One a particle and two |
|
(d) One a particle and two |
In the absence of other conductors, the surface charge density
|
(a) Is proportional to the charge on the conductor and its surface area |
|
(b) Inversely proportional to the charge and directly proportional to the surface area |
|
(c) Directly proportional to the charge and inversely proportional to the surface area |
|
(d) Inversely proportional to the charge and the surface area |