What happens to the control circuit of a car window motor if an object stalls the motor during upward movement?

In the scenario where an object stalls the motor of a car window during its upward movement, the correct answer indicates that there is an increase in both voltage (VR) and motor current (IMOTOR).

When a motor is stalled, it means that it cannot rotate due to an obstruction, yet it continues to draw current from the power supply. The effects of this condition are twofold: the motor continues to attempt to overcome the load caused by the blockage, which leads to an increase in the motor current (IMOTOR). This is often referred to as stalling current, which is significantly higher than the normal operating current of the motor.

Additionally, as the motor remains powered but unable to move, the voltage across the motor (VR) can increase potentially due to various factors such as a compensatory adjustment by the control system trying to deliver more power to overcome the stall condition.

This situation can lead to overheating of the motor due to excessive current flow and potentially damage the motor or the circuit if protective measures aren't in place. In practical applications, a well-designed system would employ overload protection mechanisms to detect such stall conditions and cut off the power supply to prevent damage.

The interruption of the circuit that occurs in an overloaded situation highlights the importance of protective