engineering recuitment BHEL Engineer Trainee Mock Test 2025 Electromagnetic Theory Magnetostatics Magnetic Energy
The relationship between relative permeability (μr) and magnetic susceptibility (X) of the medium is
1
μr = 1 + X
2
\({\mu _r} = \frac{1}{{1 + \chi}}\)
3
μr = 1 - X
4
\({\mu _r} = \frac{1}{\chi}\)