Back EMF Equation and Calculating A/C Starter Current | Homework Example

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Girn
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Homework Statement


An A/C starter has a 12V supply & a back EMF of 6V. If the resistance is 0.1 ohms, calculate current during start-up & while in operation

Homework Equations


E=IR
Not sure what else? Sorry I am stuck.

The Attempt at a Solution


Start up current
E=IR
12V=I x .01
I = 120A

operating current
6V=I x .01
I = 60A
 

Discussion

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Girn said:
Start up current
E=IR
12V=I x .01
I = 120A

operating current
6V=I x .01
I = 60A
Looks correct.