13 - chapter31-question2 The area of an elastic circular loop decreases at a constant rate, dA/dt =-3.5x10-m/s. The loop is in a magnetic field 0.28 T whose direction is perpendicular to the plane of the loop. At t =0, the loop has area 0.285 m. What is the induced emf (in mV) at t= 0? Option1 Option2 Option3 Option4 Options 7.4 112 2.6 9.8 6.5 a) Option5 b) Option1 20114 Option2 Option3 e) O Option4

13 - chapter31-question2 The area of an elastic circular loop decreases at a constant rate, dA/dt =-3.5x10-m/s. The loop is in a magnetic field 0.28 T whose direction is perpendicular to the plane of the loop. At t =0, the loop has area 0.285 m. What is the induced emf (in mV) at t= 0? Option1 Option2 Option3 Option4 Options 7.4 112 2.6 9.8 6.5 a) Option5 b) Option1 20114 Option2 Option3 e) O Option4

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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2. The figure below shows a 99-turn square coil rotating about a vertical axis at at ? = 1,520 rev/min. The length of a side of the coil is 20.0 cm. The horizontal component of the Earth's magnetic field at the coil's location is equal to 2.00 ✕ 10−5 T. a) What is the magnitude of the maximum emf (in mV) induced in the coil by the Earth's magnetic field? mV b) What is the orientation of the coil with respect to the magnetic field when the maximum emf occurs? The plane of the coil is oriented 45° with respect to the magnetic field. The plane of the coil is perpendicular to the magnetic field. The plane of the coil is parallel to the magnetic field.
1. In the figure of coil and magnet, explain how the meter moves in terms of induced current, as the magnet is pushed into the coil, stopped and then pulled out of the coil in the opposite direction. N.
1. A 500-turn circular coil with an area of 1.54 x 102 m² is perpendicular to a 0.060 T field. The magnetic field changes to 0.020 T in the opposite direction in 0.12 s. B₁ = 0.060 T Initial What is the average emf induced in the coil? ↓ ↓ B = 0.020 T Final
18. A 0.65-T magnetic field is perpendicular to a circular loop of wire with 73 turns and a radius of 18 cm. If the magnetic field is reduced to zero in 0.12 s, what is the magnitude of the induced emf? Chap 22_#10
5. What is the induced emf for a single ring of cross section area 0.25 m² if it is in a magnetic field which is reduced from 0.45 T to 0.25 T in 8.0 ms? Assume that the magnetic field is oriented to be GO perpendicular to the plane containing the ring?
4. A coil of 15 turns and radius 10 cm surrounds a long solenoid of radius 2.00 cm and has 1.00 x 103 turns per meter. The current in the solenoid changes as I = 5.00 sin 120t, where I is in amps and t is in seconds. Find the induced emf in the 15 turn coil as a function of time. %3D
P2 The number of turns of a solenoid of length L = 0.5 m is N = 2000, the area of its cross section is A = 16 cm?. At a moment the current in the coil changes at a rate of 100 A/s. What is the induced voltage in that long straight wire of length 2l = 20 cm (the wire is next to the centre of the coil) which I(t), I(t) 2l 20 b) a) is perpendicular to the axis of the coil, if its two ends are equidistant from the coil, and its centre is at a distance of l from the coil; b) has the same direction as the previous one, and one of its end is at a distance of l from the axis of the coil?
11. A solenoid with 150 tums and a cross sectional area of 25 cm has a magnetic field of 0.65 T along its axis. If the field is confined within the solenoid and changes at a rate of 0.35 T/s, what is the magnitude of the induced EMF in the solenoid?
Q3/ A 10 cm radius loop of wire of 5 Ohm/cm resistance is initially oriented perpendicular to 0.75 T magnetic field. The loop is rotated so that its plane is parallel to the field direction in 15 s. what is the maximum and minimum induced emf in the loop? What is the maximum current in the loop? What is the maximum flux through the coil? When can we get maximum flux? What is the condition for producing the emf?
2. The current in a very long solenoid with radius a and n turns per unit length varies over time as i(t) = Ct². Concentric with the solenoid is a conducting ring of radius r. a) Write an expression for the potential difference induced in the ring. b) Write an expression for the magnitude of the electric field induced at an arbitrary point on the ring. c) Is the ring necessary for the induced electric field to exist? Radius = r Radius i(t) = Ct² -O V = V(t) = a
What is the current induced in the coil (in A) at the following times? A) 0.001 seconds B) 0.002 seconds