Question

Find current i in circuit shown in figure.

(a) 0.5A 

(b) 0.2A 

(c) 1A 

(d) 2A

Answer 1

Answer : (a) 0.5A 

The circuit given in the question, is a balanced Wheatstone bridge, so no current is flow in the branch BC and it behaves like an open circuit. 

So, circuit becomes as shown below :

Now, 

In the above circuit,

R_ABD = 5 + 10 = 15Ω 

R_ACD = 10 + 20 = 30Ω 

Resistance. R_ABD and R_ACD in parallel, 

So,