A wire of Nichrome (a nickel -chromium- iron alloy commonly used in heating elements) is 1.0 m long and 1.0 mm? in cross-sectional area. It carries a current of 4.O A when a 2.0 V potential difference is applied between its ends. Calculate the conductivity of Nichrome. Option1 Option2 Option3 Option4 Option5 1.0 × 106 2.0 × 106 | 3.0 × 106 | 4.0 × 106 | 5.0 × 106

A wire is 1.2 m long and 1.2 mm² in cross-sectional area. It carries a current of 5.6 A when a 3.0 V potential difference is applied between its ends. Calculate the conductivity of the material of which this wire is made. Number i 1 Units (Q.m)^-1

Problem 3: A 1.2 g wire has a density of 2.7 g/cm3 and a resistivity of 2.7 × 10−8 Ωm. The wire has a resistance of 15 Ω. a) How long is the wire? b) The wire is made up of atoms with valence 1 and molar mass 26.98 g/mol. What is the drift speed of the electrons when there is a voltage drop of 30 V across the wire?

Question A2 Pure copper has a resistivity of 1.68 x 10-8 Nm. Some accurate cubes of copper are prepared, and electrical measurements are made, for which current is passed across a pair of opposite faces. a) Comparing a 2.5 cm cube and a 5 cm cube, which will have the higher conductance? Ex- plain your answer. b) Given eight 1 cm cubes, how can they be stacked to get the highest and the lowest resis- tance between opposite faces of the stack? Calculate the resistance of each stack.

A potential difference of 3.00 µV is set up across a 2.00 cm length of a wire (with resistivity of 10-8 2'm) that has the cross-section area of 106 m². How much charge drifts through a cross section of the wire in 4.0 ms? Give your answer in µC.

A copper wire of radius a = 0.172 mm has an aluminum jacket of outer radius b = 0.231 mm. There is a current i = 1.58 A in the composite wire. Take the resistivity for copper and aluminum to be 1.69 × 10*Q-m and 2.75 × 10-°2-m. Calculate the current in (a) the copper and (b) the aluminum. (c) If a potential difference V = 10.4 V between the ends maintains the current, what is the length in meters of the composite wire? (a) Number i Units (b) Number i Units (c) Number i Units

A copper wire of radius a = 0.240 mm has an aluminum jacket of outer radius b = 0.329 mm. There is a current i = 1.57 A in the composite wire. Take the resistivity for copper and aluminum to be 1.69 × 10-8Ω·m and 2.75 × 10-8Ω·m. Calculate the current in (a) the copper and (b) the aluminum. (c) If a potential difference V = 13.1 V between the ends maintains the current, what is the length in meters of the composite wire?

A conductor has a cross-sectional area of 2.3x 10P m and the number of free electrons per unit volume is 8.5x 1028 electron/m³. When the current is 6.1 A, find the drift speed (in mm/s) of the electrons. Use the charge of the electron to be 1.6x1019 C. Select one: OA 0.26 OB. 25.60 OC.0.13 OD. 19.50 OE 0.20

A 1.00-mm-radius, cylindrical copper wire carries a current of 8.00 A. If each copper atom in the wire contributes one free conduction electron to the current, what is the drift velocity of the electrons in the wire? Some useful information: MCu= 63.546 g/mole, Pcu = 8.96 g/cm3, and NA = 6.02 x 1023 mole-1. %3D a. 0.304 mm/s b.0.510 mm/s O c. 0.733 mm/s d. 0.0923 mm/s O e. 0.187 mm/s

A spool of aluminum wire 290 m long and with a diameter of 0.360 mm is at 20.0°C. For aluminum, the resistivity is 2.82 x 10-8 Q ·m and the temperature coefficient of resistivity is 3.90 x 10-3 (°C)-1. (a) What is the magnitude of the electric field (in V/m) in the wire if it carries a current of 0.600 A? V/m (b) What is the electric power (in W) delivered to the spool while it carries a current of 0.600 A? W (c) What is the power (in W) delivered to the spool if the potential difference across the wire is held constant and the temperature is increased to 310°C?