Heat
- In a pressure cooker the cooking is fast because
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Correct Option: A
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- Which of the following statement (s) is (are) true about thermal radiations?
(i) Thermal radiation are electromagnetic waves
(ii) All bodies emit thermal radiations at all temperature
(iii) Thermal radiations are reflected from mirror
(iv) Thermal radiations of all wavelengths travel in free space with same velocity
Choose the correct answer
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Correct Option: D
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- When an ideal gas under goes an isothermal expansion, the pressure of the gas in the enclosure falls. This is due to
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Correct Option: B
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- If is hotter for the same distance over the top of a flame than it is on one side of it because
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Correct Option: C
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- Heat is associated with
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Correct Option: A
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