Question 392Electricity & Electronics - QMED

The correct answer is B) Starting current is approximately 4.75 times the normal full load current value. This is correct because induction motors typically have a high starting current, often 4-6 times the full load current, in order to overcome the initial torque requirements during startup. The torque-speed curve in figure "A" shows a very high starting torque, which corresponds to the high starting current depicted in figure "B". The other answer choices are incorrect: A) The starting current is typically higher than 1.5 times the full load current. C) The pull-up point is usually around 50-70% of the full load torque, not 20%. D) Rated torque and current typically occur at around 2-4% slip, not 20%.