Ohm

Key Stage 3

Meaning

The Ohm is the scientific unit of resistance.

An Ohm is represented with the symbol Ω.
An Ohm is one Volt per Amp.

Converting to Ohms

 Unit To convert Ohms 1 Megaohm (1MΩ) Convert to Ohms x1000,000. 1000,000Ω 1 kiloohm (1kΩ) Convert to Ohms x1000. 1000Ω 1 ohm (1Ω) Convert to Ohms x1. 1Ω 1 milliohm 1(mΩ) Convert to Ohms /1000. 0.001Ω 1 microohm 1(µΩ) Convert to Ohms /1000,000. 0.000001Ω

Key Stage 4

Meaning

Ohms (Ω) are the SI Unit for resistance.

Ohms are shortened to the Greek letter Ω (omega).
An Ohm is one Volt per Amp.

Converting to Ohms

 Unit To convert Ohms 1 megaohm (1MΩ) Convert to Ohms x106 1x106Ω 1 kiloohm (1kΩ) Convert to Ohms x103 1x103Ω 1 Ohm (1Ω) Convert to Ohms x1 1Ω 1 milliohm 1(mΩ) Convert to Ohms x10-3 1x10-3Ω 1 microohm 1(µΩ) Convert to Ohms x10-6 1x10-6Ω 1 nanoohm 1(nΩ) Convert to Ohms x10-9 1x10-9Ω

References

AQA

Ohms, pages 54-55, GCSE Physics; Third Edition, Oxford University Press, AQA

Edexcel

Ohms, pages 146-147, GCSE Physics, Pearson Edexcel
Ohms, pages 386-387, GCSE Combined Science, Pearson Edexcel

OCR

Ohms (Ω), pages 104, Gateway GCSE Physics, Oxford, OCR