A piece of resistance wire, 15.6 m long and of cross-sectional area 12 mm² 0 °C, passes a current of 7.9 A when connected to d.c. supply at 240 V. Calculate (a) resistivity of the wire, (b) the current which will flow when the temperature rises to 55 °C . The at temperature of temperature coefficient of the resistance wire is 0.00029 / °C.

A piece of resistance wire, 15.6 m long and of cross-sectional area 12 mm² 0 °C, passes a current of 7.9 A when connected to d.c. supply at 240 V. Calculate (a) resistivity of the wire, (b) the current which will flow when the temperature rises to 55 °C . The at temperature of temperature coefficient of the resistance wire is 0.00029 / °C.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 29P: The current of an election beam has a measuredcurrent of I=50.00A with a radius of 1.00 mm2. What is...

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