A 3 phase induction motor is controlled by voltage and frequency control such that the ratio V/f is constant. At 50 Hz, the starting torque is 100 N-m. At 25 Hz, the starting torque

A single phase half wave converter is feeding-a resistor load. The input voltage is v = V_{m} sin ωt. If firing angle is zero, the output dc voltage V_{dc} and output rms voltage V_{rms} respectively