Without further context or qualification, 3V means 3V DC.
Exam question on Ohm's law.
- Thread starter Mah_Student
- Start date
I suppose you should specify both voltage and phase!
Yes. A minus sign is a 180° phase difference, which is a BIG difference. The difference between the two hot lines in your home (assuming you have two hot wires) is 180°. Connect them directly together and you will have an idea how important that minus sign is.
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