A 200 V d.c. shunt motor with armature resistance of 0.2 Ω and carrying a current of 50 A is running at 960 r.p.m. If the flux is reduced by 10% at constant torque and with negligible iron and friction losses, the speed will be nearly When, I₁ = 50 A ⇒ ϕ₁ = Flux per pole, N = 960 rpm and flux is reduced by 10% at constant.
Torque, N = ?