An electron is accelerated through a potential difference of 200 volts. If e/m for the electron be 1.6 
coulomb/kg, the velocity acquired by the electron will be
|
(a) 8 |
(b) 8 |
(c) 5.9 |
(d) 5.9 |
(a) 8 
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At a certain place the angle of dip is 30° and the horizontal component of earth's magnetic field is 0.50 Oersted. The earth's total magnetic field is
(a) 
|
(b) 1 |
(c) 
|
(d) 
|
The apparent vertical shift of the image of a coin placed at the bottom of a water tank having constant depth of water is proportional to (given refractive index of water = $\mu$).
After 1α and 2β emissions
|
(a) Mass number reduces by 3 |
(b) Mass number reduces by 4 |
|
(c) Mass number reduces by 6 |
(d) Atomic number remains unchanged |
