EMF S

Question 1

define electromotive force (EMF)

Answer 1

a source as energy transferred per unit charge in driving charge around a complete circuit

Question 2

distinguish between EMF and potential difference (p.d.) in terms of energy considerations

Answer 2

EMF is the driving electric force from a cell or generator. Potential difference results from the current passing through a resistance within a circuit. EMF is the cause. Potential difference is the effect.

Question 3

si units of emf

Answer 3

volt

Question 4

define the potential difference between points

Answer 4

Potential difference is the difference in the amount of energy that charge carriers have between two points in a circuit

Question 5

si units of pd

Answer 5

volt