Question 3 only 2.An electric clothes dryer has a heating element with a resistance of 8.6 Q. (a) Whatis the current in the element when it is connected to 240 V? (b) How much chargepasses through the element in 50 min? (Assume direct current.)(Ans. 28 A, 8.4x10ª C)3.Calculate the current density in a gold wire at 20°C, if an electric field of 0.740 V/mexists in the wire.4.If the magnitude of the drift velocity of free electrons in a copper wire is 7.84×104m/s, what is the electric field in the conductor?5.A 12- V battery causes a current of 0.60 A through a resistor. (a) What is itsresistance, and (b) how many joules of energy does the battery lose in a minute?(Ans. 20 2, 430 J)6.An electric heater is constructed by applying a potential difference of 110 V across

Given, Temperature, T=200 C, and electric field, E=0.740 V/m.

Answered: 3. Calculate the current density in a…

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3. Calculate the current density in a gold wire at 20°C, if an electric field of 0.740 V/m exists in the wire.

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter17: Current And Resistance

Section: Chapter Questions

Problem 22P: The human body can exhibit a wide range of resistances to current depending on the path of the...

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Question

Question 3 only

2.
An electric clothes dryer has a heating element with a resistance of 8.6 Q. (a) What
is the current in the element when it is connected to 240 V? (b) How much charge
passes through the element in 50 min? (Assume direct current.)
(Ans. 28 A, 8.4x10ª C)
3.
Calculate the current density in a gold wire at 20°C, if an electric field of 0.740 V/m
exists in the wire.
4.
If the magnitude of the drift velocity of free electrons in a copper wire is 7.84×104
m/s, what is the electric field in the conductor?
5.
A 12- V battery causes a current of 0.60 A through a resistor. (a) What is its
resistance, and (b) how many joules of energy does the battery lose in a minute?
(Ans. 20 2, 430 J)
6.
An electric heater is constructed by applying a potential difference of 110 V across

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