10th Class Physics Chapter 2 TestTRANSFER OF THERMAL ENERGY

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Thermal radiation travels in the form of:

   1. Sound waves

   2. Water waves

   3. Electromagnetic waves

   4. Vibrating atoms

2. The natural phenomenon caused by convection current is:

   1. Earthquakes

   2. Land and sea breezes

   3. Magnetic fields

   4. Solar eclipses

3. Which of the following gases acts to trap heat in the Earth's atmosphere?

   1. Oxygen

   2. Nitrogen

   3. Carbon dioxide

   4. Hydrogen

4. Radiators used for heating rooms have thin slots or fins to increase their:

   1. Weight

   2. Density

   3. Surface area

   4. Thickness

5. The increase in carbon dioxide in recent years led to:

   1. Global cooling

   2. Global warming

   3. More conduction

   4. A thicker ozone layer

6. Solar planets are usually black becuase they need to:

   1. Reflect sunlight

   2. Absorb maximum heat

   3. Stay cool

   4. Look beter

7. Potassium permagnate crystals in water are used to show:

   1. Conduction

   2. Convection currents

   3. Radiation

   4. Evaporation

8. The Sun's heat reaches the Earth:

   1. Through conduction between air particles

   2. Through convection in space

   3. Through radiation via electromagnetic waves

   4. Through reflection by the moon

9. When the surface temperature of an object increases, it radiates:

   1. Less energy

   2. More energy

   3. Zero energy

   4. Equal energy

10. When a kitchen pan is placed on a stove, heat transfers from the flame to the pan mainly by:

    1. Convection

    2. Conduction

    3. Radiation

    4. Insulation