Which of the following changes would result in a clockwise emf in the loop? When you...
Faraday’s Law and Induced EMF The figure displays a rectangular loop of wire with sides x and y placed in a region where a uniform magnetic field ! exists. The resistance of the loop is R. Initially the field is perpendicular to the plane of the loop and is directed out of the page. The loop can rotate about either the vertical or horizontal axis, passing through the midpoints of the opposite sides, as shown. 1. Which of the following...
Learning Goal: To understand the terms in Faraday's law and to be able to identify the magnitude and direction of induced emf. Faraday's law states that induced emf is directly proportional to the time rate of change of magnetic flux. Mathematically, it can be written as E=???B?t, where E is the emf induced in a closed loop, and ??B?t is the rate of change of the magnetic flux through a surface bounded by the loop. For uniform magnetic fields the...
The picture shows a rectangular current-carrying loop in a uniform magnetic field that is directed right. The loop is free to rotate about the axis shown as the dashed line in the top view. (a) Select all the correct statements about this situation from the list below. As seen from the side view, the initial net torque on the loop is clockwise As seen from the side view, the initial net torque on the loop is counterclockwise As seen in the top view, the...
top view side view The picture shows a rectangular current-carrying loop in a uniform magnetic field that is directed right. The loop is free to rotate about the axis shown as the dashed line in the top view. (a) Select all the correct statements about this situation from the list below As seen from the side view, the initial net torque on the loop is clockwise As seen from the side view, the initial net torque on the loop is...
A square coil of wire of side 2.90 cm is placed in a uniform magnetic field of magnitude 2.25 T directed into the page as in the figure shown below. The coil has 21.5 turns and a resistance of 0.780 Ω. If the coil is rotated through an angle of 90.0° about the horizontal axis shown in 0.335 s, find the following. A square coil is shown in the plane of the page, and inside the coil a magnetic field...
shows a cross section of three parallel wires each carrying a current of 15 A. The s in wires A and C are out of the paper, while that in wire B is into the paper. The figure Q5: What is the direction of the magnetic force by A on C? a. A does not exert force on C. d. out of the page g. downward b. rightward e. into the page h. none of these c. leftward f. upward...
4. Two concentric wire loops lie in the plane of the page. Loop A carries a current IĄ counter-clockwise (Assume that each wire loop forms a closed circuit so that current is able to flow. Each wire has some small non-zero resistance.) loop A loop B (3 pts. total; - pt. per error) What direction of current would EACH of the following actions induce in loop B? Consider each situation SEPARATELY and INDIVIDUALLY from the others Choose from the following...
The Singapore Flyer (a diameter of 155 m) rotates clockwise with a constant rate ω = 0.6 radians per second. Dr. Greco, a 80 kg passenger, is riding in the gondola at an angle of 40 degrees from the horizontal as shown. (a) What is the magnitude of the parallel component of the contact force exerted by the Ferris wheel on Dr. Greco? (b) What is the magnitude of the perpendicular component of the contact force exerted by the Ferris...
A circular loop of wire is rotated at constant angular speed about an axis whose direction can be varied. In a region where a uniform magnetic field points straight down, what must be the orientation of the loop's axis of rotation if the induce emf is zero? Explain a. any horizontal orientation will do b. it must be vertical c. it must make an angle 45 degrees to the vertical d. none of these answers
A square coil of wire of side 3.80 cm is placed in a uniform magnetic field of magnitude 2.00 T directed into the page as in the figure shown below. The coil has 30.5 turns and a resistance of 0.780 2. If the coil is rotated through an angle of 90.00 about the horizontal axis shown in 0.335 s, find the following. Rotation axis X X X (a) the magnitude of the average emf induced in the coil during this...