Question 393Electricity & Electronics - QMED

The correct answer is B) across-the-line starters. Across-the-line starters are the most common type of starter used to connect polyphase induction motors to full line voltage at the instant of start-up. This is because across-the-line starters provide the motor with the full line voltage, allowing it to develop its maximum starting torque and reach its operating speed quickly. The other options, such as autotransformer starters, compensator starters, and primary-resistor starters, are used to reduce the voltage applied to the motor during start-up, which can help limit the starting current but may also reduce the starting torque.