Heat energy absorbed by a system in going through a cyclic proces… - Vidyadip

MCQ

Heat energy absorbed by a system in going through a cyclic process shown in figure is

A
$10 \pi \mathrm{J}$
B
$10 \pi \mathrm{J}$
✓
$10 \pi \mathrm{J}$
D
$10^{-3} \pi J$

✓

Answer

Correct option: C.

$10 \pi \mathrm{J}$

(c) In a cyclic, $\Delta U=0$From FLOT, $\Delta Q=\Delta U+\Delta W=0+\Delta W=$ Area of closed curve$\begin{array}{rl}\Rightarrow \Delta Q=\pi r \pi\left(\frac{20}{2}\right)^2 & k P_a \times \text { litre } \\& =100 \pi \times 10^3 \times 10^{-3} \mathrm{~J}=100 \pi \mathrm{J}\end{array}$

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