Final answer:
A motor has four leads out of it: two red and two black. The resistance between the red leads is 3 ohms. The resistance between the black leads is 5 ohms. The black leads are connected to the blue winding
So, the correct answer is B. Blue.
Step-by-step explanation:
When dealing with a motor with four leads, it is important to understand the winding configuration. In this case, the resistance measurements provide crucial information. The fact that the resistance between the red leads is 3 ohms and the resistance between the black leads is 5 ohms indicates that the red leads are likely connected to one winding and the black leads to another.
In a typical motor with four leads, there are two windings, each with two ends. The resistance measurement between the leads can help identify which leads belong to the same winding. In this scenario, the lower resistance (3 ohms) between the red leads suggests that they are part of the same winding, while the higher resistance (5 ohms) between the black leads indicates that they are also part of the same winding.
Therefore, based on these resistance measurements, it can be concluded that the black leads are connected to the B. Blue winding.
So, the correct answer is B. Blue.