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JEE PHYSICS MCQ: THERMODYNAMICS

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A sample of an ideal gas undergoes an isothermal expansion. If dQ,dUd Q, d U and dWd W represented the amount of heat supplied, the change in internal energy and the work done respectively, the
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Correct option: B
dQ=+ved Q=+ \mathrm{ve} and dU=0,dW=+ved U=0, d W=+ \mathrm{ve}
Option B (dQ=+ved Q=+ \mathrm{{ve}} and dU=0,dW=+ved U=0, d W=+ \mathrm{{ve}}) is correct because in an isothermal process, the temperature remains constant, so the change in internal energy is zero, and heat supplied equals work done.

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