Resistors in Series and Parallel - GCSE Physics
This video explains resistors in electrical circuits in more detail. When resistors are added in series their total resistance increases, while in parallel the total resistance decreases. In series
In a series circuit, the total resistance is simply the sum of the individual resistances and with each resistor that's added in series, the total resistance increases.
The series resistor equation is: RT = R1 + R2 + R3
In a parallel circuit, the total resistance is slightly more complicated. The more resistors that are added in parallel, the total resistance of the circuit decreases. The inverse of the total resistance is equal to the sum of the inverses of the other resistances.
The parallel resistor equation is: 1/RT = 1/R1 + 1/R2 + 1/R3
Thanks for watching,
Lewis
Relevant for GCSE Physics 9-1 in the following exam boards:
AQA (including Trilogy)
Edexcel
CCEA
OCR A
OCR B
WJEC
CIE (Cambridge International Examinations) IGCSE
Edexcel International IGCSE
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