Which statement about a voltmeter is correct?
A voltmeter measures the current in a component and is connected in series with the component.
A voltmeter measures the current in a component and is connected in parallel with the component.
A voltmeter measures the potential difference (p.d.) across a component and is connected in series with the component.
A voltmeter measures the potential difference (p.d.) across a component and is connected in parallel with the component.