Final answer:
The effective resistance of two resistors in parallel with resistances of 100 ohms and 150 ohms is 60 ohms.
Step-by-step explanation:
To find the effective resistance of two resistors in parallel, you can use the formula for parallel resistance:
1/Rtotal = 1/R1 + 1/R2.
For the two given resistors of 100 ohms and 150 ohms, the calculation is as follows:
1/Rtotal = 1/100 ohms + 1/150 ohms
1/Rtotal = 1.5/150 + 1/150
1/Rtotal = 2.5/150
Rtotal = 150/2.5
Rtotal = 60 ohms.
Therefore, when a 100 ohms and a 150 ohms resistor are connected in parallel, the effective resistance is 60 ohms.