Question

A system is taken through a cyclic process represented by a circle as shown. The heat absorbed by the system is ______.

 

Options

• `pi xx 10^3` J

• `pi/2` J

• `4pi xx 10^2` J

• πJ

Answer 1

A system is taken through a cyclic process represented by a circle as shown. The heat absorbed by the system is `underlinebb(pi/2 J)`.

Explanation:

In the cyclic process, ΔQ = Work done = Area inside the closed curve. Treat the circle as

an ellipse of area = `pi/4(P_2 - P_1) (V_2 - V_1)`

⇒ ΔQ = `pi/4{(150 - 50) xx 103}`

= `pi/2`J