# Resistors in series and in parallel

#### mustaphashehu1

Two resistors connected in series have an equivalent resistance of 690 ohms. When they are connected in parallel, their equivalent resistance is 150 ohms. Find the resistance of each resistor

#### ChipB

PHF Helper
If you have wire resistors A and B in series the total resistance is A+B .

If you put them in parallel, total resistance is AB/(A+B).

You have two equations in 2 unknowns - now solve for A and B.

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