Equivalent resistance for resistors in parallel for 2 resistors:
Equivalent resistance for resistors in series:
R2 and R4 are in series.
R24 = 7.5 + 10 = 17.5 Ω
Consider the circuit shown below. Suppose four resistors in this circuit have the values of R1 = 13 Ω, R2 = 7.5 Ω, R3 = 7.7 Ω and R4 = 10 Ω, and that the emf of the battery is 18 V.
Find the current through each resistor using the rules for series and parallel resistors
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