Electricity- Power and Resistance Flashcards
(4 cards)
1
Q
What does a source of e.m.f. do?
A
Transfers chemical energy to electrical energy
2
Q
What do components with a p.d. across them do?
A
Transfer electrical energy to other forms
3
Q
What is the definition of the volt?
A
It is the p.d. between two points in an electric circuit if 1J of electrical energy is transferred for every 1C of charge that moves between the points.
4
Q
How should voltmeters be connected, and what resistance should they have?
A
They should be connected in parallel with the circuit with a high resistance
