1- What is the maximum voltage that can be applied across a2.3-kΩkΩ resistor rated at 1414 watt?
Express your answer to two significant figures and include theappropriate units.
2- A certain copper wire has a resistance of 19.0 ΩΩ . At somepoint along its length the wire was cut so that the resistance ofone piece is 7.0 times the resistance of the other.
Determine the length of the short piece.Express your answerusing two significant figures.----------- %%of the length of thewire.
3-
Calculate the ratio of the resistance of 11.0 mm of aluminumwire 2.3 mmmm in diameter, to 23.0 mm of copper wire 1.6 mmmm indiameter. The resistivity of copper is 1.68×10−8Ω⋅m1.68×10−8Ω⋅m andthe resistivity of aluminum is 2.65×10−8Ω⋅m2.65×10−8Ω⋅m.
Express your answer using two significant figures.
