Chpt 22 - Electromotive Force and Potential Difference

Question 1

What is potential difference (p.d)?

Answer 1

(between two points) in a circuit is the energy lost by one coulomb as it moves from one point to another.
–>unit = Joule per coulomb (J C^-1) or volt (V)

Question 2

What is a voltmeter?

Answer 2

Used to measure potential difference
Always connected in parallel with the part of the circuit across which the p.d is to be measured.

Question 3

What is an electromotive force (emf)?

Answer 3

A voltage when applied to a circuit