City Guilds Model Questions Vol1 2020 Engineering Question 2

Practice practical question 2 from the 2020 City Guilds Model Questions Vol1 Engineering examination. This question covers Electrical resistance, Resistivity, Temperature coefficient of resistance .

City Guilds Model Questions Vol1 2020 Engineering Practical

Topics: Electrical resistance Resistivity Temperature coefficient of resistance

Question 2 CITY_GUILDS_MODEL_QUESTIONS_VOL1 • 2020 • ENGINEERING • practical

A copper wire of length 0.250 m and diameter 1.0 mm is connected directly to a DC power supply. The following measurements are recorded for three different currents:

Question Parts

( a )

Determine the resistance of the wire for each current and comment on the constancy of the resistance.

( b )

Using the data for I = 3.0 A (ΔT = 12 °C), calculate the resistivity of copper at the measured temperature, then obtain the resistivity at the reference temperature of 20 °C. (Take α = 0.0039 °C⁻¹ for copper.)

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About This Question

This is City Guilds Model Questions Vol1 2020 Engineering Question 2. It is one of the practical questions from the 2020 City Guilds Model Questions Vol1 Engineering examination.

The question covers Electrical resistance, Resistivity, Temperature coefficient of resistance .

View More City Guilds Model Questions Vol1 2020 Engineering Questions More City Guilds Model Questions Vol1 Practice Questions Back to Questions

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