If a battery of emf 2 V with internal resistance one ohm is connected to an external circuit of resistance R across it, then the terminal p.d. becomes 1.5 V. The value of R is
A. 1 Ω
B. 1.5 Ω
C. 2 Ω
D. 3 Ω
Answer:D
If a battery of emf 2 V with internal resistance one ohm is connected to an external circuit of resistance R across it, then the terminal p.d. becomes 1.5 V. The value of R is
A. 1 Ω B. 1.5 Ω C. 2 Ω D. 3 Ω