b) Resistors

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Last updated 9:06 PM on 4/23/26
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5 Terms

1
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  • explain how additional resistors in a series circuit affects the total resistance

  • each additional resistor increases the length of the wire

  • increases the total resistance

2
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  • state the formula for the total resistance in a series circuit

  • R = R1 + R2 + R3…

    • total resistance of a series circuit (Ω) = resistance of the first resistor (Ω) + resistance of the second resistor (Ω) + resistance of the third resistor (Ω)…

3
New cards

  • explain how additional resistors in a parallel circuit affects the total resistance

  • each additional resistor

  • increases the number of pathways

  • increases the total cross-sectional area of the wires

  • decreases the total resistance

4
New cards

  • state the formula for the total resistance in a parallel circuit

  • 1/R = 1/R1 + 1/R2 + 1/R3

    • 1/total resistance of a parallel circuit (Ω) = 1/resistance of the first resistor (Ω) + 1/resistance of the second resistor (Ω) + 1/resistance of the third resistor (Ω)

5
New cards

  • state the relationship between the ratio of resistance and the ratio of p.d. between two components in a series circuit

  • ratio of R between two components = ratio of V across two components