Nichrome alloy has a resistivity of 110 × 10−6 Ωcm. From a roll of nichrome wire of 2.5 mmdiameter, a length 1 m long is taken.a) Calculate the resistance R and the conductance G of the piece of wire.b) A second piece also 1 m long is connected in parallel to the first. Calculate the resistanceand conductance of the pair. A large capacitor of 1000 µF is charged by a steady current of 1 mA until it reaches a voltage of100 V. At that voltage, the charging circuit is disconnected.a)Calculate how long the charging takes.b) A 10 k2 resistor is connected across the capacitor to discharge it. Sketch a graph of thecurrent I in the resistor as a function of time, with appropriate numbers and units markedon the axes.

Given that, Resistivity of nichrome alloy, ρ= 110 x 10-6 Ω cm Diameter of nichrome wire, d = 2.5 mm…

Answered: Nichrome alloy has a resistivity of 110…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 55P

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Nichrome alloy has a resistivity of 110 × 10−6 Ωcm. From a roll of nichrome wire of 2.5 mm
diameter, a length 1 m long is taken.
a) Calculate the resistance R and the conductance G of the piece of wire.
b) A second piece also 1 m long is connected in parallel to the first. Calculate the resistance
and conductance of the pair.

A large capacitor of 1000 µF is charged by a steady current of 1 mA until it reaches a voltage of
100 V. At that voltage, the charging circuit is disconnected.
a)
Calculate how long the charging takes.
b) A 10 k2 resistor is connected across the capacitor to discharge it. Sketch a graph of the
current I in the resistor as a function of time, with appropriate numbers and units marked
on the axes.

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