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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.

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
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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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
Transcribed Image Text: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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