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A tightly coiled spring having 75 coils, each 3.50 $\mathrm{cm}$ in diameter, is made of insulated metal wire 3.25 $\mathrm{mm}$ in diameter. An ohmmeter connected across opposite ends of the spring reads 1.74$\Omega .$ What is the resistivity of the metal?

$1.75 \times 10^{-6} \Omega$

Physics 102 Electricity and Magnetism

Chapter 19

Current, Resistance, and Direct-Current Circuit

Electric Charge and Electric Field

Gauss's Law

Electric Potential

Capacitance and Dielectrics

Current, Resistance, and Electromotive Force

Direct-Current Circuits

Electromagnetic Induction

Rutgers, The State University of New Jersey

University of Michigan - Ann Arbor

Hope College

McMaster University

Lectures

10:31

A capacitor is a passive two-terminal electrical component that stores electrical energy in an electric field. The effect of a capacitor is known as capacitance. The electrical charge stored in a capacitor is proportional to the potential difference between its terminals. A capacitor is defined as an electrical component that can store an electric charge. The effect of a capacitor is known as capacitance. The charge on a capacitor is directly proportional to the potential difference across its terminals. The unit of capacitance in the International System of Units (SI) is the farad (F), defined as one coulomb per volt. In electrical engineering, a common symbol for capacitance is the lowercase Greek letter "rho" (?). The capacitance of a capacitor is also expressed in farads.

18:38

In physics, electric flux is a measure of the quantity of electric charge passing through a surface. It is used in the study of electromagnetic radiation. The SI unit of electric flux is the weber (symbol: Wb). The electric flux through a surface is calculated by dividing the electric charge passing through the surface by the area of the surface, and multiplying by the permittivity of free space (the permittivity of vacuum is used in the case of a vacuum). The electric flux through a closed surface is zero, by Gauss's law.

06:00

A tightly coiled spring ha…

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A wire of diameter 0.500 m…

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A wire of diameter 0.800 $…

03:31

A coil is formed by windi…

01:10

A wire has a diameter of $…

01:07

An aluminum wire has a dia…

02:38

You apply a potential diff…

here it is, given that the supreme condensed 75 Quarles and the east coil is off diameter. 3.5 centimeter so diameter of each quell physical 23 point five centimeter. So which is equal to 3.5 times 10 to the power minus two meter. So the land of the wire in each, while Izzy could circumference. So, Linda, where in each quad is equal to years circumference and then we have the farm Electrical current circumference is equal to buy into d. So the linda off no way in 75 wise will be called to 75 times circumference off each quiet. That will be called to 75 times by into d no, by putting the value 75 times hereby is 3.14 and the diameter apiece coil is three point five times 10 to the hour minus two meter. So we have the answer equal to eight point 246 meter. So this is the land off the wire in 75 course went away in 75 course that is in the simpering lent a while in supreme it is us. Given the problem, that dime it off why he's keep trying to five times tend to the Bower monetary media, so it is aware there will be the half of its diameter. They would sit by 25 times 10 to the power minus three meter a bond. Two. No. The area opposition aware can be completed as the formula a equal to fire domes To get off. Nobody put in different values here in pIease, Trippi and 14 and Eyes 3.25 times 10 to the hour, minus three meter upon two. So we get area processional wire equal toe and point 2957 times 10 to the hour, minus six. It's a good meter. No, we want to calculate that is sooty of the material as we have. The relation there under the study of the material is equal to resistance in Times area opposition, aware upon photo length here. But his sense is even in the problem. There's just one by seven for home area, a process you know where it is and find 2957 times tend to the bar minus six. Secured meteo upon Lind of the wire that is the length of the wire in the supreme, which is and what? 246 meter. So we get role equal toe 1.75 times. Kendall a power minus six. Home Mita. Nurse Sanson. Thanks. About what you

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