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today's quiz is from Class 11 Physics >> Thermodynamics >> Heat engine (questions)
👍15🔥1
A device that converts heat into mechanical work is called
Anonymous Quiz
54%
Heat engine
15%
Refrigerator
27%
both a and b
4%
none of above
👍47😁8🥰7👏7💯5🔥4🎉2❤1
A heat engine source has to be at a higher temperature for it to work. TRUE or FALSE
Anonymous Quiz
77%
True
23%
False
👍44🥰14😁9❤7👏6🏆3
What does a sink do in a heat engine ?
Anonymous Quiz
27%
It releases the heat towards engine.
41%
It absorb the heat from engine.
28%
It absorbs the heat from source.
4%
none of above
👍37🤔12🔥9🥰8👏8❤6😢4🏆4😁2🙏2
Work done by a heat engine if Q₁ is the heat from source and Q₂ is the heat absorbed at sink.
Anonymous Quiz
29%
Q₁ /Q₂ J
16%
Q₁ J
35%
Q₁ - Q₂ J
19%
Q₂ - Q₁ J
👍66🤔15🤯14🔥9🏆9🌭7🥰5😁5👏3💯2❤1
The efficiency of an engine will always be given by
Anonymous Quiz
50%
Output energy / Input energy
33%
Input energy / Output energy
13%
Output energy*Constant
4%
Input energy* Constant
👍76😁17👏14🔥13🌭9🤔7❤6🥰4🎉4🤡4💯3
Consider 2 satellites A and B having time periods 16 hours and 1 hour, respectively. What is the ratio of the radius of their orbits?
Anonymous Quiz
27%
4:1
27%
8:1
31%
16:1
15%
64:1
👍124🤔43🤯32❤21😁20😢14🔥13👏13🥰11🤩3❤🔥2