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Circuit Rules Help!

Hi everyone,

So I'm really confused about the circuit rule regarding P.D. in parallel circuits. How is P.D. calculated for say, a resistor that is in parallel?

Reply 1

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Original post by sarah_maqbool

Hi everyone,

So I'm really confused about the circuit rule regarding P.D. in parallel circuits. How is P.D. calculated for say, a resistor that is in parallel?

When you have a parallel component in a circuit, the voltage across each of the branches is the same (but the current can differ).

For example: in a circuit with a 10v cell connected to two parallel resistors, the PD across each resistor will be 10v. Using V=IR, you can then find the current flowing in each branch, if that's needed.