Question

Consider a simple circuit shown in Fig 3.2. stands for a variable resistance R ′. R ′ can vary from R₀ to infinity. r is 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 a constant as R′ is varied. 

(c) Current I depends sensitively on R ′. 

(d) I ≥V/r+R always.

Answer 1

(a), (d)

(a) Potential drop across AB is nearly constant as R′ is varied. 

(d) I ≥V/r+R always.