EMF and Internal Resistance Flashcards
1
Q
EMF
A
Total energy transferred per unit charge by the supply
2
Q
Internal Resistance
A
Resistance of the cell
3
Q
Terminal P.D.
A
Energy transferred per unit charge to the external circuit (load)
4
Q
Lost Volts
A
Energy transferred per unit charge inside the cell due to internal resistance
5
Q
Lost Volts + Terminal Volts =
A
EMF
6
Q
How can you find the internal resistance of a cell?
A
Variable resistor, measure V across cell and I
7
Q
What goes on x and y?
A
x- current
y- P.D.
8
Q
What’s the gradient?
A
-r
9
Q
What’s the y-intercept?
A
EMF
