Question

What resistance will the ohmmeter measure in the circuit shown below?

A. 19 ohms
B. 26 ohms
C. 38 ohms
D. 74 ohms

https://el-gizmos.s3.amazonaws.com/img/DB/AQ_2097_510.gif

Answer 1

I think the answer for this question is c

Answer 2

B. - 26 ohms

Step-by-step explanation:

To find the total resistance of a compound circuit, find the equivalent resistance of the parallel components first. The equivalent resistance equation states that :

1R=1R1+1R2+1R3

Each light bulb has a resistance of 18 ohms, so the equivalent resistance of the parallel components is :

1R=118+118+118=318=16

So the resistance of the parallel components is 6 ohms. The next resistor is connected in series and has a resistance of 20 ohms, so the total resistance is 6+20=26 ohms.