A DC series motor drives a load, the torque of which varies as the square of the speed. Assuming the magnetic circuit to be remain unsaturated and the motor resistance to be negligible. If the motor speed reduced to half the value it has a full voltage, which of the following is/are true?
Stray losses of the motor may be ignored.1
The terminal voltage reduced by 75%
2
The motor current reduced by 50%
3
The terminal voltage increased by 25%
4
The motor current increased by 50%