question_answer

A cell of negligible resistance and e.m.f. 2 volts is connected to series combination of 2, 3 and 5 ohm. The potential difference in volts between the terminals of 3 ohm resistance will be                                     [CPMT 1976]

A)                    0.6

B)                                      2/3

C)                    3                                        

D)            6

Correct Answer: A

Solution :

             Current supplied by cell \[i=\frac{2}{2+3+5}=\frac{1}{5}A\] So potential difference across 3 will be \[V=\frac{3\times 1}{5}=0.6V\]