Year: 2021
Topic: Current electricity
Time :
1.
Three resistors having resistances r1, r2 and r3 are connected as shownin the given circuit. The ratio \(\displaystyle \frac{i_3}{i_1}\)of currents in terms of resistances usedin the circuit is
(1). \(\displaystyle \frac{r_1}{r_2 + r_3}\)
(2). \(\displaystyle \frac{r_2}{r_2 + r_3}\)
(3). \(\displaystyle \frac{r_1}{r_1 + r_2}\)
(4). \(\displaystyle \frac{r_2}{r_1 + r_3}\)