| 1 |
Neuron was discovered by |
- A. Sir Willium Crooks
- B. Goldstein
- C. James Chadwik
- D. Neil Bohr
|
| 2 |
In a discharge tube, the pressure of a gas is kept at |
- A. 10-2 atm
- B. 10-4 atm
- C. 10-6 atm
- D. 10-8 atm
|
| 3 |
The value of Planck's constant is |
- A. 6.63 x 10-34 Js
- B. 6.63 x 10-32 Js
- C. 6.63 x 10-30 Js
- D. 6.63 x 10-28 Js
|
| 4 |
___________ is used in treatment of cancer. |
- A. Nil
- B. Cobalt-60
- C. C-12
- D. H-3
|
| 5 |
Half life of C-14 ________________ years. |
- A. 5800
- B. 5700
- C. 5600
- D. 5500
|
| 6 |
The maximum no.of electrons that can be accommodated in M shell are |
|
| 7 |
Canal rays are actually |
- A. Electrons
- B. Protons
- C. Neutrons
- D. X-rays
|
| 8 |
The no.of neutrons in deutrium is |
|
| 9 |
In ________________ Rutherford's was studying radiations. |
- A. 1911
- B. 1931
- C. 1921
- D. 1922
|
| 10 |
Which one of the following is the most penetrating?<br> |
- A. protons <br>
- B. electrons <br>
- C. neutrons<br>
- D. alpha paticles<br>
|
