s part of a lecture demonstration, a physics professor plans to hold an uninsulated current-carrying wire in her hands. For safety's sake, the potential difference between her hands is to be no more than 3 V. She holds her hands 1.3 m apart, with the wire stretched tightly between them. The wire is to carry 5.00 A of current and is to be made of aluminum. What is the minimum wire radius in millimeters that is consistent with safety? Let the resistivity of aluminum be 2.75x10^-8Ω⋅m

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Q: as part of a lecture demonstration, a physics professor plans to hold an ununsulated current…

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Q: What electric field strength is needed to create a 4.0 A current in a 1.6-mm-diameter iron wire?

A: Current, I = 4.0 A Radius of the wire, r = 0.0008 m

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Q: The figure shows wire section 1 of diameter D1 = 5.50R and wire section 2 of diameter D2 = 4.00R,…

A: Given: The diameter of section 1 is 5.50R. The diameter of section 2 is 4.00R. The length L is 1.70…

Q: (5) Current is flowing through a cylindrical copper wire with radius 6.33mm and length 92.1cm. This…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

Q: What electric field strength is needed to create a 4.8 A current in a 1.6-mm-diameter iron wire?

A: Given:Current  = 4.8 ADiameter of wire = 1.6 mmRadius of wire = 0.8 mm

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Q: An iron wire with cross section 2.5x10^-6 m^2 carries current 126 A. Find the drift velocity Vd, in…

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Q: The figure shows wire section 1 of diameter D1 = 6.50R and wire section 2 of diameter D2 = 4.00R,…

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Q: The figure shows wire section 1 of diameter D1 = 5.50R and wire section 2 of diameter D2 = 4.0OR,…

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Q: current of I = 1.4 A is passing through a conductor with cross sectional area A = 4.5 × 10-4 m2. The…

A: given that i = 1.4 Amp  A=4.5 × 10-4 m2  n = 9.7 x 1027 m-3 we know that i = neA Vd

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Q: A caterpillar of length 6.00 cm crawls in the direction of electron drift along a 8.20-mm-diameter…

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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.