3. A total resistance of 3 ohm must be produced by combining an unknown resistor R with a 12 ohm resistor. a) What is the resistance of R? b) How must R be connected to the 12 ohm resistor?

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Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.