Question

What is the combined resistance of three 30ohms resistors connected in series?




with the explanation plz ​

Answer 1

Answer:

Let us call three ends as A,B,C

Open AB ;

AC and BC are in series

30 + 30 Ohms are in Series ; That makes 60 Ohms

This is in parallel with AB 30 ohms

60 in Parallel with 30

I/R = 1/60 + 1/30 = 3/60 = 1/20 Ohms

R = 20 Ohms