18) A 60 Ohm resistor is made by winding Platinum wire into a coil. If the Platinum wire has a diameter of 0.10 mm, what length of wire is needed? Note: Resistivity value of Platinum is 10.4 x 10-8 a) 1 b) 2 c) 3 d) 4 e) 4.5

18) A 60 Ohm resistor is made by winding Platinum wire into a coil. If the Platinum wire has a diameter of 0.10 mm, what length of wire is needed? Note: Resistivity value of Platinum is 10.4 x 10-8 a) 1 b) 2 c) 3 d) 4 e) 4.5

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 14CQ: The power dissipated in a resistor is given by P = V2/R, which means power decreases if resistance...

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Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

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18) A 60 Ohm resistor is made by winding Platinum wire into a coil. If the
Platinum wire has a diameter of 0.10 mm, what length of wire is needed?
Note: Resistivity value of Platinum is 10.4 x 10-8
a) 1
b) 2
c) 3
d) 4
e) 4.5

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