| 1 |
There are ways to transfer the heat from one place to another. |
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| 2 |
Rooms are heated using gas heater by: |
- A. Conduction only
- B. Convection and radiation
- C. Radiation only
- D. Convection only
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| 3 |
Amount of heat that flows in unit time is called: |
- A. Rate of flow of heat
- B. Q/t
- C. Conductivity
- D. Both A and B
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| 4 |
The quantity of heat absorbed by the body depends upon: |
- A. Colour of surface
- B. Nature of surface
- C. Shape of surface
- D. Both a & b
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| 5 |
The radiation from sun is: |
- A. Alpha
- B. Gamma
- C. Radio
- D. Ultraviolet
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| 6 |
Convention is done by ____________ |
- A. Vibration of atoms
- B. Actual movement of particles
- C. Same as conduction
- D. Nil
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| 7 |
What gas behaves as glass or polythene to radiation: |
- A. Nitrogen
- B. Hydrogen
- C. Carbon di oxide
- D. Methane
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| 8 |
The mathematical formula of thermal conductivity is |
- A. k =Q/t x L/A (T1 - T2)
- B. k =Q/t x L/A (T1 + T2)
- C. k =t/Q x L/A (T1 - T2)
- D. k =2Q/t x L/A (T1 + T2)
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| 9 |
Those objects that conduct electricity are: |
- A. Conductors
- B. Insulators
- C. Semi conductOrs
- D. None of these
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| 10 |
Glass and transparent polythene sheets allow radiations of wavelength to pass through them: |
- A. Long
- B. Medium
- C. Short
- D. All
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