A) \[2.0\,\Omega \]
B) \[5.0\,\Omega \]
C) \[0.5\,\Omega \]
D) \[8.0\,\Omega \]
Correct Answer: C
Solution :
\[l=\frac{E}{r+R}\] When short circuited, external resistance = 0 \[4=\frac{2}{r}\Rightarrow \,r=\frac{2}{4}=0.5\,\Omega \]You need to login to perform this action.
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