You can tell by making sure that the lights are unplugged and tighten lights then plug it in if I didn't work it's burnt :) hope it works
Answer:
The work done is zero
Explanation:
No work is performed or required in moving the positive charge from point A to point B
I can’t open or look at the image
It would be metric
this is the most popular, or most famous technique of measuring(In USA)
hope that this helps you! =)