TRB MODEL QUESTIONS FOR PHYSICS
| 41. |
Laser is a device to produce |
| |
- A. micro waves
- B. x–rays
- C. magnetic waves
- D. coherent waves
|
| 42. |
The conversion of a solid into a liquid on heating is called |
| |
- A. melting
- B. evaporation
- C. evaporation
- D. condensation
|
| 43. |
The maximum displacement of the bob from the mean position is called |
| |
- A. velocity
- B. amplitude
- C. period of oscillation
- D. length of the pendulum
|
| 44. |
The mass per unit volume of a substance is called |
| |
- A. area
- B. force
- C. density
- D. volume
|
| 45. |
Carbon dioxide turns lime water |
| |
- A. blue
- B. green
- C. red
- D. milky
|
