Current Electricity - Result Question 104

109. For the network shown in the Fig. the value of the current $i$ is

[2005]

(a) $\frac{9 V}{35}$

(b) $\frac{18 V}{5}$

(c) $\frac{5 V}{9}$

(d) $\frac{5 V}{18}$

Show Answer

Answer:

Correct Answer: 109. (d)

Solution:

  1. (d) It is a balanced Wheatstone bridge. Hence resistance $4 \Omega$ can be eliminated.

$\therefore R _{\text{eq }}=\frac{6 \times 9}{6+9}=\frac{18}{5}$

$\therefore i=\frac{V}{R _{eq}}=\frac{5 V}{18}$