Discussion Forum



1)

In the following network, the current flowing through 15$\Omega$ resistance is

1462021764_p1.PNG


A) 0.8 A

B) 1.0 A

C) 1.2 A

D) 1.4 A

Answer:

Option C

Explanation:

1462021764_p1.PNG

 The above circuit is a balanced Wheatstone bridge.

 Hence, the above circuit  is drawn  in the following manner

1462021405_p2.PNG

 From the above circuit,

18 l=24(21-l)

18 l= 50.4-24 l

 24 l+18l=50.4

 42 l=50.4

 l = $\frac{50.4}{42}$

$\therefore$   l= 1.2 A