- #1
Janiceleong26
- 276
- 4
1. Homework Statement
P=IV
I used the terminal voltage of battery B, that is I minus the voltage across the internal resistance of battery B from the e.m.f. of battery B, then I multiply it with the current which is 2.5A (calculated earlier) . But it should be just the e.m.f. of battery B multiply the current. Why the e.m.f. and not the terminal p.d.?
Homework Equations
P=IV
The Attempt at a Solution
I used the terminal voltage of battery B, that is I minus the voltage across the internal resistance of battery B from the e.m.f. of battery B, then I multiply it with the current which is 2.5A (calculated earlier) . But it should be just the e.m.f. of battery B multiply the current. Why the e.m.f. and not the terminal p.d.?