A) 30V
B) 60 V
C) 50 V
D) 40 V
Correct Answer: B
Solution :
For first case,\[\frac{\varepsilon }{R+r}=\frac{10}{R}\] ... (i) or second case,\[\frac{\varepsilon }{5R+r}=\frac{30}{5R}\] (ii) Dividing (i) by (ii), we get r = 5R From (i), \[\frac{E}{R+5R}=\frac{10}{R}\] E =60VYou need to login to perform this action.
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