Question
Would increasing the number of batteries in a circuit that is connected to a small electric motor affect the speed of the motor, if all other variables are kept constant?
No, because it is the magnetic force, not the electric force, that controls the motor speed.
Yes, the motor would run faster because the increased electrical force increases the magnetic force in the motor.
No, the speed of a motor is controlled only by the number of wire coils in the motor.
Yes, the motor would run faster because increased current causes the motor to become warmer.
No, because it is the magnetic force, not the electric force, that controls the motor speed.
Yes, the motor would run faster because the increased electrical force increases the magnetic force in the motor.
No, the speed of a motor is controlled only by the number of wire coils in the motor.
Yes, the motor would run faster because increased current causes the motor to become warmer.
Answers
GPT-5 mini
Yes, the motor would run faster because the increased electrical force increases the magnetic force in the motor.
Explanation: Adding batteries in series raises the supply voltage, which (for a given motor and load) increases armature current. More current in the windings produces a stronger magnetic field and greater torque, so the motor accelerates to a higher speed until the back EMF from its rotation balances the applied voltage. (Limits: motor resistance, stall current, friction, and heating can limit or damage the motor if voltage is increased too much.)
Explanation: Adding batteries in series raises the supply voltage, which (for a given motor and load) increases armature current. More current in the windings produces a stronger magnetic field and greater torque, so the motor accelerates to a higher speed until the back EMF from its rotation balances the applied voltage. (Limits: motor resistance, stall current, friction, and heating can limit or damage the motor if voltage is increased too much.)