2. A circular loop consisting of a single turn of wire and a diameter of 15 cm lays flat at the edge of a table, as shown. A uniform magnetic field of 0.50 T passes perpendicularly through the table and nowhere else. If the loop is pulled horizontally straight off the table at a speed of 15 m/s, what is the average emf induced in the loop. In what direction does the resulting induced current flow? If the loop has a resistance of 10 , how much current is induced in the loop? Hint: this is NOT a motional emf problem. [Answers: (a) E = 0.88 V, (b) ccw, (c) I = 0.088 A] O O O O O O OOO OO OO Poo 1> 00.00 0 0 OO

2. A circular loop consisting of a single turn of wire and a diameter of 15 cm lays flat at the edge of a table, as shown. A uniform magnetic field of 0.50 T passes perpendicularly through the table and nowhere else. If the loop is pulled horizontally straight off the table at a speed of 15 m/s, what is the average emf induced in the loop. In what direction does the resulting induced current flow? If the loop has a resistance of 10 , how much current is induced in the loop? Hint: this is NOT a motional emf problem. [Answers: (a) E = 0.88 V, (b) ccw, (c) I = 0.088 A] O O O O O O OOO OO OO Poo 1> 00.00 0 0 OO

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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3. A loop of wire sits in a uniform magnetic field, everywhere pointing toward you. Due to a changing magnetic flux through the loop, an induced current flows in the wire, clockwise as shown. The area of the loop is 0.590 m^2 , and the magnetic field initially has magnitude 0.950 T. Suppose that, over a time period of 1.55 s, the magnetic field changes from its initial value, producing an average induced voltage of 0.217 V. What is the final value of the magnetic field after this time period? 0.608 T 0.912 T 1.824 T 1.520 T
4. A square circuit has 2 m sides and is perpendicular to a uniform magnetic field, with half the area of the loop in the field, as shown. The loop contains a 9 V voltage source. The magnitude of the magnetic field varies with time, with B = 6 + 5t, where B is the field strength in teslas and t is the time in seconds. (a) Determine the value of the induced emf in the circuit. (b) Which way does the overall current flow in the circuit, clockwise or counter-clockwise? Or is the current zero? Explain why your answer is correct.
50. A straight, stiff wire of length 1.00 m and T=0 T= 0 mass 25 g is sus- pended in a magnetic field B=0.75 T. The wire is connected to -1.00 m an emf. How much current must flow in the wire and in what direction so that the wire is sus- pended and the tension in the supporting wires is zero?
14. A wire is oriented into a loop that has a diameter of 1 cm. This loop is then pulled closed in 0.5 s. If there was a magnetic field directed through the loop of 0.25 T, what emf is induced?
2. A flat, circular coil has radius 10.0 cm and 200 turns. It is immersed in a uniform magnetic field that makes an angle of 60.0 degrees with the plane of the coil as shown below. The magnetic field is increasing with time at a rate of 12.0 T/s. What is the magnitude of the emf induced in the coil (in V)? (A) 65.3 (B) 100 (C) 133 (D) 76.8 (E) 49.8 (F) 30.0 unour em to the
6. A loop of a wire has the shape shown in the drawing. The top part of the wire is bent into a semicircle of radius r = 0.18 m. The normal to the plane of the loop is parallel to a constant magnetic field of magnitude 0.88 T. What is the magnitude of the change in the magnetic flux that passes through the loop when, starting with the position shown in the drawing, the semicircle is rotated through quarter of a revolution? Wb B (into paper) 190of19 oof19 oon9 oof 19.0of19 oof19 o 19 0of19 oof19 oo of19 oof oof19 19 0of19 0of19 oof19 oof19 o0
1. An AC generator has 85 rectangular loops on its armature. Each loop is 11 cm long and 8 cm wide. The armature rotates at 1500 rpm about an axis parallel to the long side. If the loop rotates in a uniform magnetic field of 0.8 T, which is perpendicular to the axis of rotation, what will be the maximum output voltage of this generator? Volts
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