# Current Electricity: Voltage

### Description

This note covers voltage (or potential difference). Topics include the formula for potential difference, the concept of potential, measuring potential difference and electromotive force. It is aimed at a leaving certificate student or someone who has an interest in voltage.
Note by alex.examtime9373, updated more than 1 year ago
 Created by alex.examtime9373 over 10 years ago
402
2

## Resource summary

### Page 1

Potential Difference (Voltage) Work done in moving a charge of 1 coulomb from one point to another Scalar quantity Unit = Volt

V = W/Q V = voltage W = work Q = charge

Potential When two charges are very far apart, there is no force between them and they are said to be at zero potential We take the Earth to be our zero potential The potential difference between a point and the earth is called the potential of that point When a conductor is earthed, this means that its potential is brought to zero

Voltmeter Measures voltage Connected in parallel with the component that it is measuring

Electromotive force emf A voltage that is applied to a circuit

Sources of emf A device in which any form of energy is converted to electrical energy Battery Electric generator

New Page

### Similar

Using GoConqr to teach science
AQA Physics P1 Quiz
Forces and motion
GCSE AQA Physics - Unit 3
Using GoConqr to study science
GCSE AQA Physics 1 Energy & Efficiency
Waves
Forces and their effects
Junior Cert Physics formulas
OCR Physics P4 Revision