Answers and Tips
- The voltage drop across the relay should be around 24V. If it is much higher or lower, you can adjust the voltage with a screw driver to be around 24V.
- The current varies a lot here. Typically, I see around 50 mA. When the students measure the current in and out, it will be different. They will get better results if they do not have a negative number.
- This varies again based on current measurement.
- The relay coil should be off and the wires should be removed before taking a measurement. The value should be around 465 to 512, depending upon the coil.
- They need to explain whether or not Ohm's Law worked here or not. I want some detail as to why or why not, not just a yes.
- They should be using a brown wire for the 24V and a blue wire for the 0V or common.
- The rest of the questions are reminders for safety.

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