Topic 14: Current of Electricity

Question 1

Electric current, I

Answer 1

Rate of flow of charge.

Question 2

Electromotive force, emf

Answer 2

The energy transformed from chemical to electrical per unit charge when charge is driven round a complete circuit.

Question 3

Potential difference, pd

Answer 3

The energy transformed from electrical to other forms per unit charge when charge is passed through an electrical component.

Question 4

Resistance, R

Answer 4

Ratio of potential difference across a component to the current passing through it.