A) 1.0 V
B) 1.5 V
C) 2.0 V
D) 2.5 V
Correct Answer: B
Solution :
Since \[i\,=\left( \frac{E}{R+r} \right),\] we get \[0.5=\frac{E}{2+r}\] ......(i) \[0.25=\frac{E}{5+r}\] .....(ii) Dividing (i) by (ii), we get \[2=\frac{5+r}{2+r}\] Þ \[r=1\Omega \] \ \[0.5=\frac{E}{2+1}\] Þ \[E=1.5V\]You need to login to perform this action.
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