Voltage Divider Equation Shortcut

This tutorial shows a shortcut formula that you can use to determine unknown resistances without calculating current, in a series resistor circuit. It uses the voltage divider equation.
This video is part of a full free course on electric circuits. The course covers DC circuits, circuit laws, current & voltage sources, series & parallel resistors, nodal analysis, mesh analysis, and AC circuits.
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Thanks for watching, I hope it helps!

[@goneman2195]

dose this only work for series?

[@Engineer4Free]

Yes, but there is a different formula for parallel: ua-cam.com/video/tCJ2s4aoHvM/v-deo.html