Q6 of 44 Page 85

Find the electric current in the following circuit:

(a) First, we will find equivalent resistance.

Formula used


Parallel Resistance formula



Series resistance formula




The highlighted (yellow colour) resistance are in series with each other and is in parallel with the other one.


Ra = 30Ω + 30Ω


Ra = 60Ω




Total resistance is 20Ω


(b) Total current


Formula used


Ohm’s Law



V = voltage


I = current


R = resistance


2V = 20Ω x I


I = 0.1A


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