1.An aluminum wire having a radius of 8.97 mm and carrying a current of 6.43 mA is connected in a circuit. What is the drift speed of the electrons carrying this current? The density of electrons in an aluminum is 6.02×10^28 electrons/m^3. There is one conduction electron per atom in aluminum. Note: elementary particle charge e=1.602×10^−19 As Answer: __________ ×10^−8m/s
1.An aluminum wire having a radius of 8.97 mm and carrying a current of 6.43 mA is connected in a circuit. What is the drift speed of the electrons carrying this current? The density of electrons in an aluminum is 6.02×10^28 electrons/m^3. There is one conduction electron per atom in aluminum. Note: elementary particle charge e=1.602×10^−19 As
Answer: __________ ×10^−8m/s
2. A potential difference of 14.99 V is applied across a wire of cross-sectional area 3.41 mm^2 and length 1,095 km. The current passing through the wire is 3.7 ×10^−3 A. What is the resistivity of the wire?
Answer: _________ ×10^−8Ωm
The temperature coefficient of resistivity for copper is 0.0068(C∘)^−1. If a copper wire has a resistance of 104 Ω at 23.26°C, what is its resistance 73.37°C?
Answer: ________ V/m
answer 1,2,3
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