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Ammeter - GCSE Physics Definition

Reviewed by: Philippa Platt

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An ammeter is a device used to measure the electric current flowing through a circuit, and it is an essential tool for students studying GCSE Physics.

It is always connected in series with the component whose current is to be measured, ensuring that the entire current passes through the ammeter. The unit of current measured is the ampere (A), which reflects the rate at which charge flows.

For accurate readings, ammeters are designed to have very low resistance so that they do not significantly alter the circuit's overall resistance and current flow.

Understanding how to use an ammeter can help students investigate how different factors affect current in electrical circuits.

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Philippa Platt

Reviewer: Philippa Platt

Expertise: Chemistry Content Creator

Philippa has worked as a GCSE and A level chemistry teacher and tutor for over thirteen years. She studied chemistry and sport science at Loughborough University graduating in 2007 having also completed her PGCE in science. Throughout her time as a teacher she was incharge of a boarding house for five years and coached many teams in a variety of sports. When not producing resources with the chemistry team, Philippa enjoys being active outside with her young family and is a very keen gardener

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