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A resistor obeys Ohm's law (V=IR); the current through it is equal to the voltage across it divided by the resistance (equivalently \$I=\frac{V}{R}\$)

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hi, a somewhat basic question: if i4 = 1, and all resistors have value R, what would be the voltage drop between a and b? …
asked Mar 2 '18 by Martin Horst