Consider a simple circuit shown in the figure. R′ stands for variable resistance. R′ can vary from R0 to infinity. r is the internal resistance of the battery (r<<R<<R0).
(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≥Vr+R always. |
Which among the following statements is correct?
1. | (a, c) | 2. | (a, d) |
3. | (b, d) | 4. | (c, d) |
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