Question

A 12 volt battery in a motor vehicle is capable of supplying the starter motor with 150 A. It is noticed that the terminal voltage of the battery drops to 10 V when the engine is cranked over with the starter motor. Determine the internal resistance of the 12 volt battery.

Answer 1

Answer:
`0.0133 \Omega`

Step-by-step explanation:

Given

Voltage=12 V

Current(I)=150 A

`V_(terminal)=10 V`

`r_(internal)=(\Delta V)/(I)`

`r_(internal)=(12-10)/(150)`

`r_(internal)=(2)/(150)=0.0133 \Omega`