Question

In DC motor, flux is directly proportional to armature current.

Hint:

Remember the distinct behaviors of DC motors:

• DC Shunt Motor: Flux is constant ($\Phi \approx \text{const}$), so Torque is linear with current ($T \propto I_a$).
• DC Series Motor: Flux is variable ($\Phi \propto I_a$ before saturation), so Torque is quadratic with current ($T \propto I_a^2$).

Answer 1