A) 1.5 W
B) 2 W
C) 2.5 W
D) 3.5 W
Correct Answer: C
Solution :
By using \[i=\frac{E}{R+r}\] \[\Rightarrow 0.5=\frac{E}{11+r}\] Þ \[E=5.5+0.5r\] ..?(i) and \[0.9=\frac{E}{5+r}\] Þ \[E=4.5+0.9r\] ..?(ii) On solving these equation, we have \[r=2.5\Omega \]You need to login to perform this action.
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