P4 Physics pg 106

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  • Potential dividers
    • The higher the resistance, the greater the voltage drop
      • the larger the share of the total resistance, the larger the share of the total voltage
      • If the resistances are equal, each resistor takes half the voltage
      • The output voltage can be varied by changing one/both of the resistors for a variable resistor
    • Allow you to use a device that needs a certain voltage from a battery of a different voltage
    • The output voltage depends on the values of r1 and r2
    • Potential dividers are useful
    • Consists of a pair of resistors, they divide potential in a circuit
      • this means you get outputs of different voltages


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