• Jan 20, 2026 working principle of pmmc instrument nt passing through the coil The restoring torque provided by the spring is: \[ T_{r} = k \times \theta \] Where: \(k\) = torsion constant of the spring \(\theta\) = angular displacement At equilibrium: \[ n \times B \times A \times I = k \times \theta \] Thus, the deflection \(\theta\) (an By Ramona Bednar
