Consider a simple circuit shown in the figure. R' stands for variable resistance. R' can vary from to infinity. r is the internal resistance of the battery (r<<R<<R).
(a) Potential drop across AB is nearly constant as R' is varied
(b) Current through R' is nearly constant as R' is varied
(c) Current I depends sensitively on R
(d)
Which among the following statements is correct?
1. (a, c)
2. (a, d)
3. (b, d)
4. (c, d)
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