Bc)The mains lighting circuit for a domestic house uses two copper wires of diameter 1.5 mm,the supply (live) wire at 240 V and the return (neutral) wire at 0 V. This size wire israted to carry up to 16 A. The number of free electrons in copper is about 1023 cm-3, andthe resistivity of copper is 1.68 x 10-8 m.i)Calculate the drift velocity of the electrons in this wire if it is carrying 16 A.ii) Calculate the resistance per metre of this wire and hence the electric field in the wireat 16 A.

Answered: Image /qna-images/answer/59b16b0a-3d76-43f2-96df-5d8a1bec61f3.jpg

Answered: B c) The mains lighting circuit for a…

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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The capacitance of a parallel-plate capacitor is proportional to the area of its plates and inversely proportional to the plate separation. O True O False The drift speed of electrons in a copper wire carrying 10 A current is much greater than 1 m/sec. O True O False The electric power dissipated in a resistor is eventually converted to kinetic energy of charges. O True O False
If gold (PAu = 2.44 x 10-8 N. m) and silver (PAg = 1.59 × 10-8 n. m) wires of equal length are found to have the same resistance. 4 a) Find the ratio of their radii (rAL/r Cu)? b) Which element (Au or silver) is better for conducting electrical current? Explain. LEGO
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.
X N 3) Consider a cube whose center is at the origin, and all edges of the cube are 4 cm. A battery (DC voltage) with voltage of Vo is connected to bottom and top faces (sides) of cube as shown in left figure. a) If the volume current density in cube is given as; J=100 V₁ (x² + y²)â. A/m² then find the (DC) resistance of the structure. Hint: You can get the result without considering below part (part b). O= b) By assuming that electric field intensity is zero outside the cube (although practically there is nonzero electric field outside the cube, assume that this electric field is very small), if the conductivity of the material of the cube is given as; x² 1+ Z 0.02 10-2 S m then find and express free charge densities (where they exist) in terms of battery voltage Vo. Take cube material's relative permittivity (dielectric constant) as &r = 1.
Number 2. Show the step please.
How long does it take electrons to get from a car battery to the starting motor? Assume the current is 320 A and the electrons travel through a copper wire with cross-sectional area 0.120 cm2 and length 0.840 m. The number of charge carriers per unit volume is 8.49 x 1028 m-3. Number i Unit
Resistance of Carbon A rectangular solid made of carbon has sides lying along the x, y, and z axes, whose lengths are 1.06 cm, 2.12 cm, and 4.24 cm, respectively, as seen in figure below. Determine the resistance for current that flows through the solid in the x direction. Assume the resistivity is p= 3.00E-5 0* m. وا L2 A Tries 0/12 Determine the resistance for current that flows through the solid in the y direction. Evaluate Feedback Print SA Tries 0/12 Determine the resistance for current that flows through the solid in the a direction. Subest Answer Tries 0/12 Post Discussion Send Feedback

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