4. Suppose the light bulb in the figure below is replaced with a short wire of zero resistance, and the resistance of the rails isnegligible. The only resistance is from the moving rod, which is iron (resistivity = 9.20 x 10-8 2.m). The rod has a cross-sectionalarea of 3.50 x 10-°m2 and moves with a speed of 1.00 m/s. The magnetic field has a magnitude of 0.045 T. What is the currentin the rod?Aoof19.0ofof19 0of19 0of19 oof19 0of19of19 oaf19 ooflConducting railx L xoof19 oof19 oof1919 0of19 0of19 oof19 ooft

Resistivity of iron , ρ = 9.2 x 10-8 Ωm cross sectional area , A = 3.5 x 10-6 m2 velocity , v = 1…

4. Suppose the light bulb in the figure below is replaced with a short wire of zero resistance, and the resistance of the rails is hegligible. The only resistance is from the moving rod, which is iron (resistivity = 9.20 × 10-8 2.m). The rod has a cross-sectional area of 3.50 × 10-ºm² and moves with a speed of 1.00 m/s. The magnetic field has a magnitude of 0.045 T. What is the current n the rod? A Conducting rail 19 0of19 0of19 of19.0of19 0of19 0of19 oof19 0of19 0of19 0of19 o

4. Suppose the light bulb in the figure below is replaced with a short wire of zero resistance, and the resistance of the rails is hegligible. The only resistance is from the moving rod, which is iron (resistivity = 9.20 × 10-8 2.m). The rod has a cross-sectional area of 3.50 × 10-ºm² and moves with a speed of 1.00 m/s. The magnetic field has a magnitude of 0.045 T. What is the current n the rod? A Conducting rail 19 0of19 0of19 of19.0of19 0of19 0of19 oof19 0of19 0of19 0of19 o

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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4. A cylindrical ingot moves to the left at a constant speed (v) equal to 40.0 centimeters per second. Along a parallel steel rail at the right-hand end is connected to a rod of length (L) equal to 20.0 cm. The total resistance of the rail and rod is 2.0 ohms if the wire is in a uniform magnetic field (B) 0.500. Tesla is ejected from the page as shown in the figure. 'out L 4.3 Find the force acting on the metal rod. Choices 0.2 N 2 mN 20 mN 0.9 mN 9 mN 9 N 0.9 N 1>
3. In the figure below, a conducting rod of length L = 30.0 cm moves in a magnetic field B of magnitude 0.450 T directed into the plane of the figure. The rod moves with speed v = 5.00 m/s in the direction shown. B (a) What is the potential difference between the ends of the rod? (b) Which point, a or b, is at higher potential? (c) When the charges in the rod are in equilibrium, what are the magnitude and direction of the electric field within the rod? (d) When the charges in the rod are in equilibrium, which point, a or b, has an excess of positive charge? (e) What is the potential difference across the rod if it moves (i) parallel to ab and (ii) directly out of the page? V
4. An electron is accelerated from rest by a potential difference of 1000 V. It then enters a uniform magnetic field of magnitude 200 mT with its velocity perpendicular to the field. Calculate the radius of its path and period in the magnetic field.
1. An electron enters the region where there is a uniform magnetic field with a speed v = 9.39 x10 ^ 6 m / s, it describes a semicircular path of radius r = 0.12m, as in the figure. How long in seconds does it take in that region? (Express your answer in teslas to 3 significant figures)
2. Suppose that a rectangular toroid has 2000 windings, h = 1 cm, an inner radius of R1 = 4 cm, and an outer radius of R2 = 6 cm. What is the current flowing through the toroid when the energy in its magnetic field is 2.0 x 10-6 J?
4. A long straight wire of length 0.2 m is attached to a wall by a horizontal spring with a spring constant of k = 10 N/m. (Neglect gravity.) The wire is sitting in a uniform 0.5-T magnetic field (B) that points out of the page. When a current is turned on in the wire, the spring is stretched by 1.0 cm. What are the direction and magnitude of the current in the wire? (Recall that | Fspring = kx) A. 1.0 A, up wall B. 1.0 A, down C. 100 A, up D. 100 A, down E. 400 A, up wire 5. A long straight wire is carrying a current I = 5.0 A upward as shown in the figure below. A single, circular conducting loop of wire with a radius R = 0.02 m is located near the wire such that the closest distance from the wire to the loop's edge is 0.06 m. What must be the magnitude and direction of a current flowing around the loop such that the net magnetic field at the loop's center is zero? Iv /R A. 1.67 A, cw B. 1.67 A, cew C. 0.40 A, cw D. 0.40 A, ccw E. 1.00 A, cew 0.06 m O
3. The thin, uniform rod shown below has negligible mass and and a length of 0.200 m. It is attached to the floor by a frictionless hinge at point P. A horizontal spring with force constant k = 4.80 N/m connects the other end of the rod to a vertical wall. The rod is in a uniform magnetic field of B = 0.340 T directed into the plane of the page. There is a current of /= 6.50 A in the rod, as shown. a. Calculate the torque due to the magnetic force on the rod for an axis at point P. Do this by defining a differential magnetic force on the rod for a differential length dr at an arbitrary distance r from point P. Relate this differential magnetic force to its differential torque at point P. Then sum (i.e., integrate) the contributions from the entire length of the rod to get the total torque on the rod. b. Consider Hooke's Law, which states that the force exerted by the spring when stretched or compressed a length x is Fspring = kx. Now, given that the rod makes an angle of 53.0° with the…
11. A specimen of iron of permeability 8 x 103 weber/amp x metre is placed in a magnetic field of strength 160 amp/metre. Then magnetic induction in this iron is - (A) 20 x 10 wb/m? (C) 5 x 10 5 wb/m? (B) 1.28 wb/m? (D) 0.8 wb/m?
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