# An electricity and magnetism problem by Sudeep Salgia

**Electricity and Magnetism**Level 5

Find the value of \( j+k+p+q+r+s+t-2 \).

**Details and Assumptions:**

The bar magnet is short and \(a << x\).

\(\mu _0 \) is the permeability of vacuum.

The magnetic field due to the magnet can be considered almost parallel to the axis of the loop.

Magnitude of force of interaction between two dipoles of moments \(M_1\) and \(M_2\) is given by \( \displaystyle F = \frac{6 \mu_0 M_1 M_2 }{4 \pi x^4} \) where \(x\) is the distance between them.