37. II A circular coil of 50 loops and diameter 20.0 cm is lying flat on a tabletop and carries a clockwise current of 2.50 A. A magnetic field of 0.450 T, directed to the north and at an angle of 45.0° from the vertical down through the coil and into the tabletop, is turned on. (a) What is the torque on the coil, and (b) which side of the coil (north or south) will tend to rise from the tabletop?

37. II A circular coil of 50 loops and diameter 20.0 cm is lying flat on a tabletop and carries a clockwise current of 2.50 A. A magnetic field of 0.450 T, directed to the north and at an angle of 45.0° from the vertical down through the coil and into the tabletop, is turned on. (a) What is the torque on the coil, and (b) which side of the coil (north or south) will tend to rise from the tabletop?

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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9. A rectangular coil consists of N=10 closely wrapped turns and has dimensions a = 0.400 m and b=0.300 m. The coil is hinged along the y axis, and its plane makes an angle -60.0° with the x I- 1.20 A axis. What are the magnitude and the direction of the torque exerted 0.400 m on the coil by a uniform magnetic field B=0.800 T directed along the +x axis when the current is /=1.20 A in the direction shown? 60° 0.300 m (a) 0,576 N m, - y direction (b) 0,576 N m, +y direction (c) 0,0576 N m , -y direction (d) 0,0576 N m , +y direction (e) 0,0998 N m, -y direction (f) 0,0998 N m, +y direction
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…
3. A rod of mass m and radius R on two parallel rails that are a distance d apart and have a length L. The rod carries a curret I in the in the direction shown and rolls along the rails without slipping. A uniform magnetic field B is directed perpendicular to the rod and rails. If it starts from rest, what is the speed of the rod as it leaves the rails? (Chapter 29, Problem 38, Physics for Scientists and Engineers - 9th ed. ) B L
In an electric motor, a coil with 104 turns of radius 1.90 cm can rotate between the poles of a magnet. The magnetic field magnitude is 0.200 T. When the current through the coil is 57.7 mA, what is the maximum torque that the motor can deliver? N.m
3. A metal strip 6.5 cm long and 0.85 cm wide moves with constant velocity v through a uniform magnetic field with B = 0.0012 T pointing into the page, as shown in the figure. A potential dif- ference of 3.9 µV is measured between points x and y. (a) Which point has the higher potential, x or y? Briefly explain your reasoning. y x B (b) Calculate the speed v necessary to produce the potential difference given above.
15b
1. As shown in the figure below, two long parallel wires (1 and 2) carry currents of I1 = 2.80 A and I2 = 5.45 A in the direction indicated. (a) Determine the magnitude and direction of the magnetic field at a point midway between the wires (d = 10.0 cm). Correct Answer: Magnitude = 10.6 µT. Direction = 90° counterclockwise from the +x-axis (b) Determine the magnitude (in µT) and direction (in ° counterclockwise from the +x-axis) of the magnetic field at point P, located d = 10.0 cm above wire 1. Could you please solve for part b.
17b
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4. A rectangular coil of wire (a = 28.0 cm, b = 36.0 cm) containing a single turn is placed in a uniform 4.80 T magnetic field, as the drawing shows. The current in the loop is 12.0 A. Determine the magnitude of the magnetic force on the right side of the loop. oof19 o0 19 0of19 oof19 009 oof19 dookig oof19 a oof19 0of19o B 19. 0of19 oof19.of19 oof19.0 0of19 0of19 c