Consider a simple circuit in the figure.
Question:

Consider a simple circuit in the figure.

stands for a variable resistance R’. R’ can vary from R0 to infinity. r is internal resistance of the battery

(a) potential drop across AB is nearly constant as R’ is varied

(b) current through R’ is nearly a constant as R’ is varied

(c) current I depends sensitively on R’

(d) I ≥V/r+R always

 

Solution:

The correct answer is

(a) potential drop across AB is nearly constant as R’ is varied

(d) I ≥V/r+R always

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