Current

The current is a measure of the flow of electrons around the circuit. Electric current is measured in Amperes or Amps. The higher the current, the greater the flow of electrons.

Current is measured with an Ammeter, which is placed in the circuit, i.e. in series:

Voltage

Voltage is measured in Volts. It is a measure of the energy available, i.e. the higher the voltage, the more energy each electron is given. It is rather like the driving force that pushes electrons around the circuit.

Voltage is measured with a Voltmeter but this is not connected in series into the circuit. It is connected in parallel, across whatever you are measuring,

Contents

Safety, Static Electricity
Charge
Current Electricity, Making a bulb light, Models
Atomic Theory
Conductors and insulators
Switches, Short circuits, Circuit diagrams
Electrical circuits
Measuring current
Resistance
Power
Assessment/Discussion Material
Reference Material