**Question:**

A thin strip $10 \mathrm{~cm}$ long is on a U shaped wire of negligible resistance and it is connected to a spring of spring constant $0.5 \mathrm{Nm}^{-1}$ (see figure). The assembly is kept in a uniform magnetic field of $0.1 \mathrm{~T}$. If the strip is pulled from its equilibrium position and released, the number of oscillations it performs before its amplitude decreases by a factor of $e$ is N. If the mass of strip is 50 grams, its resistanœ $10 \Omega$ and air drag negligible, $\mathrm{N}$ will be close to

Correct Option: 3

**Solution:**

### Related Questions

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