Hi - question here:
2 x AA batteries with open circuit voltage of around 3 volts.
When connected to a 3V DC motor, voltage (measured at battery terminals) drops to around 2.8 volts.
The question I have is, when fingers are placed against the motor shaft so that there is increased friction and it turns slower, the voltage actually drops when measured both at the batteries and at the DC motor terminals.
Why is this?
thanks
2 x AA batteries with open circuit voltage of around 3 volts.
When connected to a 3V DC motor, voltage (measured at battery terminals) drops to around 2.8 volts.
The question I have is, when fingers are placed against the motor shaft so that there is increased friction and it turns slower, the voltage actually drops when measured both at the batteries and at the DC motor terminals.
Why is this?
thanks