Question

please help me this is the science Question
Q- calculate the effective resistance across the point M and N
chapter-- Electricity​

Answer 1

every parallel resistant is added like 1/R=1/R1+1/R2

and in sequential R= R1+R2

so 8 and 4 are parallel so total resistant will be as per formula 1 ---- 1/(1/8+1/4)=8/3

and 4 and 2 are parallel so resistant will be 1/(1/2+1/4) =4/3

Now these two resistance are in sequence so resistance will be 8/3+4/3=12/3=4