Electricity Flashcards
Potential difference, Electromotive Force
1
Q
What is potential difference?
A
The work that gas been done in transferring unit passive charge fringe one point to another.
2
Q
What is potential sidebar measured in?
A
Volts (v)
3
Q
What is the formula for potential difference?
A
V= IR
R=resistance (measured in ohms)
I= current (A)
4
Q
What is electromotive force?
A
A source of energy that can cause a current to for in an electrical circuit or device .
5
Q
What is Emf measured in?
A
Volts (v)
6
Q
Emf is equal to PD when?
A
Across the terminals of the cell no current is flowing.
