Q97 / 180 · AIIMS 2005 · Physics

Assertion : Reversible systems are difficult to find in real world. Reason : Most processes are dissipative in nature.

  • Correct answer
    A
    If both assertion and reason are true and reason is the correct explanation of assertion
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion
  • C
    If assertion is true but reason is false
  • D
    If both assertion and reason are false.

Solution

In a perfectly reversible system, there is no loss of energy. Losses can be minimised, friction can be reduced, the resistance in $L-C$ oscillating system can also be negligible. But one cannot completely eliminate energy losses. This makes a perfectly reversible system, an ideal.

Hence, the correct answer is option: 'A'.

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