Converging Lens Quiz with Answers PDF Download – Test 29

MCQ 141: The lens which is thick at the center but thin at the edges is called:

1. counter lens
2. fiber lens
3. converging lens
4. diverging lens

MCQ 142: The change of state from liquid to solid without a change in temperature is known as:

1. boiling
2. condensation
3. solidification
4. fusion

MCQ 143: A filament bulb rated at 30 W, coverts 15% of its electrical energy supply into light energy. Calculate the quantity of light energy emitted in 10 minutes.:

1. 1.8 kJ
2. 1.2 kJ
3. 1.5 kJ
4. 2.4 kJ

MCQ 144: By knowing the magnitude of the force and its perpendicular distance from the pivot, we can measure the:

1. turning effect
2. force applied
3. area of the door
4. size of the door

MCQ 145: In metals, a much faster mechanism of thermal energy transfer is called:

1. free electrons diffusion
2. free neutrons diffusion
3. free protons diffusion
4. free electrons conversion