E.M.F and P.d Flashcards
1
Q
Define potential difference (P.d)
A
The energy transferred per unit charge
2
Q
State the equation for potential difference
A
V=W/Q
3
Q
Define the volt
A
one volt = one joule per coulomb
4
Q
How is a voltmeter used to measure the potential difference of a circuit?
A
The voltmeter is placed in parallel to the circuit and measures the potential difference across the component.
5
Q
Define electromotive force (E.M.F)
A
The energy transferred per unit charge
6
Q
How does P.d differ from E.M.F?
A
Potential difference is the transfer of electrical energy to a component to produce other forms of energy. Electrical energy is lost
Electromotive force is the transfer of energy to a battery to produce electrical energy. Electrical energy is gained.
