TRB Physics Gk Questions and Answers
| 1. |
In nuclear reaction which one of the following is conserved? |
| |
- A. Atomic number
- B. Mass number
- C. Energy
- D. Atomic number, mass number and energy
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| 2. |
Which one of the following common devices works on the basis of the principles of mutual induction? |
| |
- A. Transformer
- B. Tubelight
- C. Photodiode
- D. Led
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| 3. |
Which one of the following pairs of rays is electromagnetic in nature? |
| |
- A. Alpha rays and X rays
- B. Alpha rays and cosmic rays
- C. Infrared rays and beta rays
- D. Infrared rays and X rays
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| 4. |
The magnetic effects of electric current was discovered by |
| |
- A. Ampere
- B. Oersted
- C. Maxwell
- D. Faraday
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