Question

A car has a fresh storage battery of e.m.f $12\,V$ and internal resistance $2 \times 10^{-2} \Omega$. If the starter motor draws a current of $80\,A$. Then the terminal voltage when the starter is on is

• A. 12V
• B. 8.4V
• C. 10.4V
• D. 9.3V

Answer 1

Answer: (C)

10.4V

Answer 2

$V=E-ir=10.4 \,V$