A copper wire has a diameter of 2.072 mm. What magnitude current flows when the drift velocity is 1.24 mm/s? Take the density of copper to be 8.92 103 kg/m3.

The quantity of charge q (in coulombs) that has passed through a surface of area 1.95 cm² varies with time according to the equation q = 6t³ + 3t + 6, where t is in seconds. (a) What is the instantaneous current through the surface at t = 0.950 s? 19.245 ✔A (b) What is the value of the current density? 987 X What is the relationship between current and current density? kA/m²

The quantity of charge q (in coulombs) that has passed through a surface of area 2.05 cm2 varies with time according to the equation q = 4t3 + 3t + 6, where t is in seconds. (a) What is the instantaneous current through the surface at t = 1.10 s? A (b) What is the value of the current density? KA/m2

An iron wire has a cross-sectional area equal to 5.50 x 10-6 m². Carry out the following steps to determine the drift speed of the conduction electrons in the wire if it carries a current of 12.0 A. (a) How many kilograms are there in 1.00 mole of iron? 0.055 kg/mol (b) Starting with the density of iron and the result of part (a), compute the molar density of iron (the number of moles of iron per cubic meter). 1.43163 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. mol/m³ (c) Calculate the number density of iron atoms using Avogadro's number. atoms/m³ (d) Obtain the number density of conduction electrons given that there are two conduction electrons per iron atom. electrons/m³ (e) Calculate the drift speed of conduction electrons in this wire. m/s Need Help? Read It

A copper wire has a circular cross section with a radius of 1.66 mm. HINT (a) If the wire carries a current of 3.18 A, find the drift speed (in m/s) of electrons in the wire. (Take the density of mobile charge carriers in copper to be n = 1.10 x 102⁹ electrons/m³.) m/s (b) For the same wire size and current, find the drift speed (in m/s) of electrons if the wire is made of aluminum with n = 2.11 x 1029 electrons/m³. m/s

A copper wire has a diameter of 1.972 mm. What magnitude current flows when the drift velocity is 1.59 mm/s? Take the density of copper to be 8.92  103 kg/m3. ______ A

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.

Problem 1. A 50.0 m long Aluminum wire has a diameter of 0.50 mm and is at 20.0°C. If it carries a current of 0.50 mA, (a) calculate the power delivered to it? (b) If the temperature is increased to 340°C and the potential difference across the wire remains constant, what is the power delivered?

A copper wire of cross-sectional area 1.30 mm2 has a current of 7.10 A flowing along its length. What is the drift speed of the conduction electrons? Assume 1.30 conduction electrons per copper atom. The mass density of copper is 9.00 g/cm3 and its molar mass is 64.0 g/mol.