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11.Thermodynamics
medium
નીચે આપેલી ચક્રીય પ્રક્રિયામાં કેટલી ઉષ્માનું શોષણ થશે?

A
$10^7 \;\pi J $
B
$10^4 \;\pi J $
C
$10^2\;\pi J$
D
$ {10^{ - 3}}\,\pi J $
(AIIMS-1995)
Solution
(c) In a cyclic, $\Delta U = 0 $
From FLOT, $\Delta Q = \Delta U + \Delta W = 0 + \Delta W = $ Area of closed curve
==> $\Delta$ Q = $\pi r^2$ = $\pi {\left( {\frac{{20}}{2}} \right)^2}k{P_a} \times litre$ $ = 100\,\pi \times {10^3} \times {10^{ – 3}}J = 100\,\pi J$
Standard 11
Physics