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JEE PHYSICS MCQ: THERMODYNAMICS
1
Medium
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Analyzing
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Assertion: For an isolated system, mechanical energy is not conserved.
Reason: For an isolated system internal energy is constant.
Reason: For an isolated system internal energy is constant.
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Correct option: D
If both Assertion & Reason are false
Option D is correct. For an isolated system, mechanical energy can be conserved if only conservative forces are acting, and internal energy is not always constant due to processes like friction.
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