10th Class Physics Chapter 1 Test10. Heat capacity and modes of heat transfer

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

1. If the same amount of heat energy is supplied to equal masses of water and copper, why does the temperature of copper increase faster?
   1. Copper has a lower specific heat capacity
   2. Water is a poor conductor of heat
   3. Convection in water dissipates heat energy quickly
   4. Radiation from water is stronger
2. The method used to determine specific heat capacity of solids is:
   1. Expansion method
   2. Method of mixtures
   3. Distillation method
   4. Sublimation method
3. The SI unit of specific heat capacity is:
   1. J/kg K
   2. J/mol K
   3. cal/g °C
   4. erg/g K
4. The main principle used in gas heaters for heating rooms is:
   1. Conduction
   2. Convection
   3. Radiation
   4. Reflection
5. In method of mixtures, principle involved is:
   1. Principle of expansion
   2. Principle of buoyancy
   3. Conservation of energy
   4. Thermal conduction
6. The handles of cooking pans are made of plastic or wood because:
   1. They are cheaper
   2. They are poor conductors of heat
   3. They are shiny
   4. They are lighter
7. What is symbol and what is unit for the heat capacity of an object?
   1. J°C⁻¹
   2. J·kg⁻¹K⁻¹
   3. J·kgK⁻¹
   4. J·kg⁻¹K
8. The surface that is the best absorber of heat radiation:
   1. Black and dull
   2. White and shiny
   3. Smooth silver
   4. Transparent glass
9. The molten portion of the Earth’s core is called:
   1. Mantle
   2. Inner core
   3. Outer core
   4. Crust
10. Carbon footprint is measure of:
    1. Water pollution
    2. Solid waste generation
    3. Greenhouse gas emissions
    4. Deforestation rate