MCQ
In adiabatic expansion
- A$\Delta U = 0$
- ✓$\Delta U = $negative
- C$\Delta U = $positive
- D$\Delta W = $zero
==> $\Delta U = - \Delta W$ i.e., $\Delta U$will be negative.
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$(A)$ In the region $0 < r < R$, the magnetic field is non-zero.
$(B)$ In the region $R < r < 2 R$, the magnetic field is along the common axis.
$(C)$ In the region $R < r < 2 R$, the magnetic field is tangential to the circle of radius $r$, centered on the axis.
$(D)$ In the region $r > 2 R$, the magnetic field is non-zero.