Question

calculate the equivalent resistance between the points A and B in this figure ,if each resistance is 2.0 ohm
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Answer 1

5 ohm

in the question the last two resistors were in parallel connection. so the equivalent resistance will be 1 ohm for that parallel arrangement. and then all the 3 resistors will be in series. so equivalent resistance will be 2+2+1=5 ohm

Answer 2

Answer:

5 ohm

Explanation:

2 resistors of 2 ohm each are in parallel. using formula 1/Rp=1/R1+1/R2

1/Rp=1/2+1/2+1

Rp=1 ohm

Now this parallel arrangement is on a whole in series with anoher 2 resistors of 2 ohm each. using formula Rs=R1+R2+R3

Rt=2+2+1=5 ohm.