MCQ
A thermodynamic system undergoes cyclic process $A B C D A$ as shown in figure. The work done by the system is

- A$P_0 V_0$
- B$2 P_0 V_0$
- C$\frac{P_0 V_0}{2}$
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$(i)$ an equilateral triangle of side $'a'.$
$(ii)$ a square of side $'a'.$
The magnetic dipole moments of the coil in each case respectively are:
