| 1 |
The energy of photon for photoelectric effect is less than |
- A. 1 MeV
- B. 2 MeV
- C. 5 MeV
- D. 8 MeV
|
| 2 |
The most abundant isotope of neon is: |
- A. Neon 21
- B. Neon 20
- C. Neon 22
- D. None of above
|
| 3 |
Half life of Uranium -239 is |
- A. 26.5 minutes
- B. 24.5 minutes
- C. 25.5 minutes
- D. 23.5 minutes
|
| 4 |
Cosmic rays consist of |
- A. Protons
- B. High energy photons
- C. Positron
- D. All of above
|
| 5 |
Bottom quark carries charge : |
- A. 2/3 e
- B. -2/3 e
- C. +1/3 e
- D. -1 /3 e
|
| 6 |
Which of the following is typical source of alpha particle. |
- A. Strontium -94
- B. Radon -222
- C. Cobalt -60
- D. Zic sulphate
|
| 7 |
How many times, the alpha particle is more massive than electrons. |
- A. 6332
- B. 7332
- C. 8332
- D. 9332
|
| 8 |
Materials can be identified by measuring their |
- A. Mass
- B. Half life
- C. Both a and b
- D. None of a,b,c
|
| 9 |
When a nucleus emits an alpha particle, its atomic mass decreases by |
|
| 10 |
What is difference is isotopes |
- A. Number of protons
- B. Number of neutrons
- C. Number of electrons
- D. Charge number
|