2. A wire is 4 in x 0.5 in x 20 ft and a resistivity of 15.75 (2 - CM)/ ft at 12 °C. Calculate its resistance if the temperature is increased by 50 °C? Take the temperature coefficient of the wire at 15 °C is 0.00375 /OC? 3. The resistance of a carbon coil is 10.5 Q at 60 °C. At what temperature will its resistance decrease to 65 percent if its temperaturo o

2. A wire is 4 in x 0.5 in x 20 ft and a resistivity of 15.75 (2 - CM)/ ft at 12 °C. Calculate its resistance if the temperature is increased by 50 °C? Take the temperature coefficient of the wire at 15 °C is 0.00375 /OC? 3. The resistance of a carbon coil is 10.5 Q at 60 °C. At what temperature will its resistance decrease to 65 percent if its temperaturo o

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.2P: The temperature dependence of resistance is also quantified by the relation R2=R1[ 1+(T2T1) ] where...

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The temperature dependence of resistance is also quantified by the relation R2=R1[ 1+(T2T1) ] where R1 and R2 are the resistances at temperatures T1 and T2, respectively, and is known as the temperature coefficient of resistance. If a copper wire has a resistance of 55 at 20C, find the maximum permissible operating temperature of the wire if its resistance is to increase by at most 20. Take the temperature coefficient at 20C to be =0.00382.
For residential water heaters, the Consumer Product Safety Commission suggests a maximum temperature setting of ___________ F (_____________ C). Some states have laws stating a maximum temperature setting of ____________ F (________________ C).
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