Question

The three resistors of resistance 5 .Q, 10 .Q and 30 .Q are connected with a 12 V battery in parallel. Determine
(a) total current in the circuit
(b) equivalent circuit resistance.(Ans : I= 4A, R=3.Q),Solve the given example.

Answer 1

1/R = 1/5 +1/10+1/30

LCM of 5 ,10 and 30 is 30

10/ 30 = 1/3

1/R=1/3

SO R= 3 OHMS

according to ohms law I=V/R

SO here

I = 12/3 = 4 ampere