IG Phy – E.M.F and P.D (II)

1 volt is equivalent to 1 joule per second (J/s).

A voltmeter must be connected in series to measure potential difference across a component.

Analogue voltmeters give a reading directly on a display.

In a series circuit, the potential difference across each component can be different.

A multimeter can measure current, voltage, and resistance.

A potential difference of 2.0 V across a component means 2.0 J of energy is transferred to thermal energy by every 1 C of charge.

The potential difference across a component is measured using an ammeter.

Potential difference is often referred to as voltage.

The battery in a circuit provides the potential difference needed to drive current through the circuit.

When current passes through a copper connecting wire, it transfers a large amount of energy to thermal energy.