- A30-300 MHz
- B30-300 GHz
- C30-300 kHz
- D30-300 Hz
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One requires energy
to remove a nucleon from a nucleus and an energy ‘
to remove an electron from the orbit of an atom. Then
|
(a) |
(b) |
(c) |
(d) |
An electron is accelerated through a potential difference of 1000 volts. Its velocity is nearly
|
(a) 3.8 |
(b) 1.9 |
(c) 1.9 |
(d) 5.7 |
The mobility of free electron is greater than that of free holes because
|
(a) The carry negative charge |
|
(b) They are light |
|
(c) They mutually collide less |
|
(d) They require low energy to continue their motion |
The image which can be obtained on a screen is called:

If in a photoelectric experiment, the wavelength of incident radiation is reduced from 6000 Å to 4000 Å then
|
(a) Stopping potential will decrease |
|
(b) Stopping potential will increase |
|
(c) Kinetic energy of emitted electrons will decrease |
|
(d) The value of work function will decrease |