The most commonly used material for making transistor is
|
(a) Copper |
(b) Silicon |
(c) Ebonite |
(d) Silver |
The most commonly used material for making transistor is
|
(a) Copper |
(b) Silicon |
(c) Ebonite |
(d) Silver |
(b) Silicon
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In a beryllium atom, if a0 be the radius of the first orbit, then the radius of the second orbit will be in general
|
(a) |
(b) |
(c) |
(d) |
The ratio of areas within the electron orbits for the first excited state to the ground state for hydrogen atom is
| (a) 16 : 1 | (b) 18 : 1 | (c) 4 : 1 | (d) 2 : 1 |
16 gm sample of a radioactive element is taken from Bombay to Delhi in 2 hour and it was found that 1 gm of the element remained (undisintegrated). Half life of the element is
|
(a) 2 hour |
(b) 1 hour |
(c) |
(d) |
A ferromagnetic material is heated above its curie temperature. Which one is a correct statement
| (a) Ferromagnetic domains are perfectly arranged |
| (b) Ferromagnetic domains becomes random |
| (c) Ferromagnetic domains are not influenced |
| (d) Ferromagnetic material changes itself into diamagnetic material |
Which of the following diagrams, shows correctly the dispersion of white light by a prism
|
(a)
|
(b)
|
(c)
|
(d)
|