MCQ
According to Hook's law force is proportional to
- A$\frac{1}{x}$
- B$\frac{1}{x^2}$
- ✓$x$
- D$x^2$
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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:
