This video explains the equation used to calculate the total resistance in parallel circuits in more detail. Some exam boards need you to calculate the equivalent resistance of resistors in parallel (not AQA).

1/RT = 1/R1 + 1/R2

This can be rearranged to get total resistance, RT = 1/(1/R1 + 1/R2)

The more resistors that are added, the less the total resistance becomes.

Thanks for watching,

Lewis

Relevant for GCSE Physics 9-1 in the following exam boards:
CCEA
WJEC (Higher only)
CIE (Cambridge International Examinations) IGCSE (Higher only)

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