Problem: The motor in a toy car operates on 6.00 V, developing a 4.50 V back emf at normal speed. If it draws 3.00 A at a normal speed, what current does it draw when starting? 

FREE Expert Solution

The operating current, resistance, and voltages are related by:

I=Vs - VbR

Vs is the source voltage, Vb is the back voltage, and R is the resistance of the coil.

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Problem Details

The motor in a toy car operates on 6.00 V, developing a 4.50 V back emf at normal speed. If it draws 3.00 A at a normal speed, what current does it draw when starting? 

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