# A student connects a buzzer to a battery in a simple series circuit. The potential difference across the buzzer is 6 V and a charge of 10 C passes through it in a certain time. Explain what is meant by a potential difference of 6 V across the buzzer, and describe the energy transfer that occurs as the charge flows through it.

> Pearson Edexcel International GCSE Physics (4PH1) — 2.2 Energy and voltage in circuits · Explain · 4 marks

> A buzzer is connected in series with a 6 V battery. A total charge of 10 C passes through the buzzer.

## Mark scheme (4 marks)

1. Potential difference is the energy transferred per unit charge (between two points in a circuit)
2. 6 V means 6 joules of energy are transferred for every coulomb of charge that passes
3. Electrical energy is transferred from the battery / supply to the buzzer
4. Electrical energy is transferred to sound (and thermal / heat) energy in the buzzer

## Key terms

- [potential difference](https://www.gradenine.co.uk/glossary/potential-difference)
- [charge](https://www.gradenine.co.uk/glossary/charge)
- [energy transfer](https://www.gradenine.co.uk/glossary/energy-transfer)

## Related

- [Revision notes for Pearson Edexcel International GCSE Physics (4PH1)](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

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Source: [GradeNine](https://www.gradenine.co.uk/q/a-student-connects-a-buzzer-to-db6d11e0) · Published by Druglandscape Ltd.