Question

Find current i in the given DC circuit.

(1) 1.25 A 

(2) 5 A 

(3) 2.5 A 

(4) 1 A

Answer 1

Correct Option is (3) 2.5 A 

 

\(\frac{x-5}{2}+\frac{x}{2}+\frac{x-y+10}{1}=0\) 

\(x-5+x+2x-2y+20=0\) 

4x -2 y = -15 .........(i) 

\(\frac{y-5}{4}+\frac{y-0}{4}+\frac{y-10-x}{1}=0\)

y-5 +y -0 -4y -40 -4x = 0 

6y - 4x = 45 ..........(ii)

i = 2.5 A

4y = 30

y = \(\frac{15}{2}\) 

And x = 0