City Guilds Model Questions Vol1 2018 Engineering Question 4

Practice practical question 4 from the 2018 City Guilds Model Questions Vol1 Engineering examination. This question covers Resistance, Resistivity, Temperature coefficient of resistance .

City Guilds Model Questions Vol1 2018 Engineering Practical

Topics: Resistance Resistivity Temperature coefficient of resistance

Question 4 CITY_GUILDS_MODEL_QUESTIONS_VOL1 • 2018 • ENGINEERING • practical

A copper wire of length 10.0 m and diameter 0.5 mm is connected to a 6.0 V battery as shown in the circuit diagram. The ammeter in series reads 4.5 A and the voltmeter across the wire reads 4.0 V. The temperature of the wire during the measurement is 35 °C.

Question Parts

( a )

Calculate the resistance of the wire from the recorded readings.

( b )

Determine the resistivity of the copper wire using the resistance found in part (a).

( c )

Given that the standard resistivity of copper at 20 °C is 1.68 × 10⁻⁸ Ω·m, calculate the temperature coefficient of resistance (α) for the wire.

( d )

Suggest two practical measures that could improve the accuracy of the resistance measurement.

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About This Question

This is City Guilds Model Questions Vol1 2018 Engineering Question 4. It is one of the practical questions from the 2018 City Guilds Model Questions Vol1 Engineering examination.

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

View More City Guilds Model Questions Vol1 2018 Engineering Questions More City Guilds Model Questions Vol1 Practice Questions Back to Questions

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