Potential Difference and E.M.F Flashcards
Define potential difference.
The energy transferred from electrical energy to other forms per unit charge.
What is the unit for potential difference?
V, volts
What does one volt equate to?
1V= 1J/C
1 volt= 1 joule per coulomb
What is the equation for potential difference?
V= W/Q
Potential Difference= Energy Transferred/Charge
Why should an ideal voltmeter have infinite resistance?
It is so that when the voltmeter is connected, no current passes through the voltmeter itself.
What is the difference between potential difference and e.m.f?
Potential difference is used to describe when work is done by the charge carriers, whilst e.m.f is used to describe when work is done on the charge carriers.
What is the equation for e.m.f?
e.m.f= W/Q
Energy transferred/Charge
