Question

14. The magnitude of l in ampere in the given circuit is
60 Ω
ΜΜΜ
1A
1A
Η.
5 Ω
15 Ω
10 Ω​

Answer 1

Answer:

Applying Kirchhoff's law in following figure.

At junction A:

i+i1+i2=1  .....(i)

For loop (i)

−60i+(15+5)i1=0

⇒i1=3i   ....(ii)

For Loop (2)

−(15+5)i1+10i2=0

⇒i2=i1=(3i)=6i

On solving equation (i), (ii) and (iii) we get i=0.1 A

Short trick:

Branch current=

main current (Total resistanceResistance of opposite branch)

⇒i=1×⎣⎢⎢⎡320+60320⎦⎥⎥⎤

=0.1 A