A copper wire of cross-sectional area 3.20 x 10-6 m² and length 3.40 m has a current of 3.00 A uniformly distributed across that area. (a) What is the magnitude of the electric field along the wire? (b) How much electrical energy is transferred to thermal energy in 30.0 min?

A current of 82.8 mA exists in a metal wire. (a) How many electrons flow past a given cross section of the wire in 11.0 min? electrons (b) In what direction do the electrons travel with respect to the current? same direction The magnitude is zero. opposite direction

A solid steel wire has a cross-sectional area of 8.05 x 10-6 m2 and is carrying a constant current of 15.0 A. The density of the wire is 8.05 g/cm3 and the material has a molar mass of 54.97 g/mol. Calculate the drift speed (in mm/s) of the electrons in the wire for the amount of current given. You can assume that each molecule of steel in the wire contributes one free electron of charge. Round your answer to 3 decimal places.

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The quantity of charge through a conductor is modeled as Q = (3.00 mC/s^4)t^4 - (3.00 mC/s)t + 8.00 mC. What is the current (in A) at time t = 2.00 s?