P4.3.2 Series and parallel circuits

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Last updated 3:09 AM on 5/14/26
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4 Terms

1
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Describe characteristics of a series circuit

  • If one lamp blows out, other lamps go out too

  • Lamps cannot be switched on and off independently

  • All lamps share the same brightness, but amount of lamps affects the brightness of each lamp (more=dimmer)

<ul><li><p>If one lamp blows out, other lamps go out too</p></li></ul><ul><li><p>Lamps cannot be switched on and off independently</p></li><li><p>All lamps share the same brightness, but amount of lamps affects the brightness of each lamp (more=dimmer)</p></li></ul><p></p>
2
New cards

Calculate current, resistance and voltage in a series circuit

  • Current: same at every point

  • Resistance: addition of all resistance

    • Increases as you add more components

  • Total voltage (p.d.): addition of each individual voltage (voltage is divided among components)

<ul><li><p>Current: same at every point</p></li><li><p>Resistance: addition of all resistance</p><ul><li><p>Increases as you add more components</p></li></ul></li><li><p>Total voltage (p.d.): addition of each individual voltage (voltage is divided among components)</p></li></ul><p></p>
3
New cards

Describe characteristics of a parallel circuit

  • If one lamp blows out, other lamps will continue to work

  • Lamps can be switched on and off independently

  • All lamps share the same brightness, but amount of lamps does not affect the brightness of each lamp (more=same brightness)

4
New cards

Calculate current, resistance and voltage in a parallel circuit

  • Total current: add up each individual current (current is divided between each branch)

    • If ammeter is placed next to the battery, it measures total current

    • If ammeter is placed on a branch, it only measures the amperes of that specific branch

  • Resistance: the reciprocal of the sum of the reciprocal of each individual resistance

    • Decreases as you add more components

  • Voltage (p.d.): same throughout the circuit

<ul><li><p>Total current: add up each individual current (current is divided between each branch)</p><ul><li><p>If ammeter is placed next to the battery, it measures total current</p></li><li><p>If ammeter is placed on a branch, it only measures the amperes of that specific branch</p></li></ul></li><li><p>Resistance: the reciprocal of the sum of the reciprocal of each individual resistance</p><ul><li><p>Decreases as you add more components</p></li></ul></li><li><p>Voltage (p.d.): same throughout the circuit</p></li></ul><p></p>