Find equivalent resistance

4.5 OHMS

Explanation:

This is the series circuit of arrangement so we add the resistance

1 + 1.5 + 2 =4.5 OHMS

We can't see the third point of the triangle. We're assuming there's nothing else connected up there, and you want the equivalent resistance between points A and B.

The 1 and the 2 are in series, so they form a single resistor of 3 ohms.

That's in parallel with the 1.5 ohmer, for an equivalent resistance between A and B of ==> 1 ohm .