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) | \(I \geq { V \over r+R}\) |
Which among the following statements is correct?
1. (a, c)
2. (a, d)
3. (b, d)
4. (c, d)