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Questions and Answers
What is the method of heat transfer involved when the wax pieces begin to fall one by one after a flame is brought in contact with the rod?
What is the method of heat transfer involved when the wax pieces begin to fall one by one after a flame is brought in contact with the rod?
- Conduction (correct)
- Convection
- None of these
- Radiation
In a container filled with water, what is the correct relation of pressures at points A, B, C, and D where B and C are at the same horizontal level?
In a container filled with water, what is the correct relation of pressures at points A, B, C, and D where B and C are at the same horizontal level?
- PA < PB = PC < PD
- PA = PB < PC = PD (correct)
- PD < PB = PC < PA
- PA = PB = PC = PD
In the picture showing Raj and his friends playing with a string-telephone, who can hear Rita speak?
In the picture showing Raj and his friends playing with a string-telephone, who can hear Rita speak?
- Only Raj
- Both Raj and Ravi (correct)
- Neither Raj nor Ravi
- Only Ravi
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Study Notes
Heat Transfer
- Conduction is the method of heat transfer involved when the wax pieces begin to fall one by one after a flame is brought in contact with the rod.
Fluid Pressure
- Pressure at points B and C are equal since they are at the same horizontal level.
- Pressure at point D (bottom of the container) is greater than at points B and C due to the weight of the water.
- Pressure at point A (surface of the water) is atmospheric pressure.
Sound Waves
- Rita's voice can be heard by Raj and his friends through the string-telephone, as sound waves are transmitted through the string.
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