Q2. An aluminium conductor composed of 63 circular strands, each of 3.35 mm diameter, has a 50 Hz resistance of 6.05x102/m at 45 °C. Assuming a 2.5% increase in strand length due to spiralling, calculate the d.c. resistance of the conductor at 45 °C, and hence determine the percentage increase in resistance due to the skin effect. (The temperature coefficient for aluminium is 228.1 °C. and the resistivity is

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Q2. An aluminium conductor composed of 63 circular strands, each of 3.35 mm
diameter, has a 50 Hz resistance of 6.05x102/m at 45 °C. Assuming a 2.5%
increase in strand length due to spiralling, calculate the d.c. resistance of the
conductor at 45 °C, and hence determine the percentage increase in resistance due
to the skin effect.
(The temperature coefficient for aluminium is 228.1 °C, and the resistivity is
2.83x10- 2m at 20 °C)
Transcribed Image Text:Q2. An aluminium conductor composed of 63 circular strands, each of 3.35 mm diameter, has a 50 Hz resistance of 6.05x102/m at 45 °C. Assuming a 2.5% increase in strand length due to spiralling, calculate the d.c. resistance of the conductor at 45 °C, and hence determine the percentage increase in resistance due to the skin effect. (The temperature coefficient for aluminium is 228.1 °C, and the resistivity is 2.83x10- 2m at 20 °C)
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