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PLEASE SHOW STEP BY STEP WORK . NO SHORTCUT. 1. Calculate the ratio of the resistance...

PLEASE SHOW STEP BY STEP WORK . NO SHORTCUT.

1.

Calculate the ratio of the resistance of 15.0 m of aluminum wire 2.1 mm in diameter, to 23.0 m of copper wire 1.8 mm in diameter. The resistivity of copper is 1.68×10−8Ω⋅m and the resistivity of aluminum is 2.65×10−8Ω⋅m.

PART A:   Determine at what temperature aluminum will have the same resistivity as tungsten does at 24 ∘C.

PART B: An electric car uses a 80-kW motor. If the battery pack is designed for 340 V, what current would the motor need to draw from the battery? Neglect any energy losses in getting energy from the battery to the motor.

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Resistance pl resi stance of aluminium 2.65x10*x15 2.65 x 10-8x15 3.14x(1.05x10-5) 0.11482 resistance of copper 1.68x10x23 3.

a) The resistivity of aluminumthe resistivity of tungsten Pau (1+α(7-5))-pr (1+α(24-5)) 2.65x10 (1+0.00429(7-20)-5.6x10-8 (1

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