31. A single loop of wire of radius 0.23 m is placed in a 0.75 T magnetic field as shown. The magnetic field is changed to a strength of 0.50 T in the opposite direction in 0.61 s. хв A. B. X C. D. X X X X X 0.23 m Before X X X What is the average emf induced the coil? 0.068 V 0.094 V 0.34 V 0.47 V X 0.23 m After . B

31. A single loop of wire of radius 0.23 m is placed in a 0.75 T magnetic field as shown. The magnetic field is changed to a strength of 0.50 T in the opposite direction in 0.61 s. хв A. B. X C. D. X X X X X 0.23 m Before X X X What is the average emf induced the coil? 0.068 V 0.094 V 0.34 V 0.47 V X 0.23 m After . B

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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07
A rectangular coil with sides 0.120 m by 0.210 m has 495 turns of wire. It is rotated about its long axis in a uniform magnetic field of 0.590 T that is perpendicular to the long axis. At what frequency f, in complete cycles per second, must the coil be rotated for it to generate a maximum voltage of 115 V? f = Hz * TOOLS x10
10. A circular wire coil with 26 turns and radius 3.81 cm is placed in a uniform magnetic field of strength 7.91 T, directed perpendicular to the plane of the wire loops. Over a period of 1.72 s, the magnetic field fades away to zero. What is the average induced emf (voltage) in the coil over this period of time? 0.872 V 0.545 V 0.327 V 0.709 V
7 The loop in the figure has an induced current as shown. The loop has a resistance of 0.18 N. Is the magnetic field strength increasing or decreasing? What is the rate of change of the field, AB/At? 150 mA X X 8.0 cm x x x 8.0 cm
003 A circular coil of wire 7.8 cm in diameter has a resistance of 1.61 2. It is located in a magnetic field of 0.304 T directed at right angles to the plane of the coil. The coil is removed from the field in 0.169 s. What is the induced emf in the coil? As- sume the magnetic flux is reduced linearly. Answer in units of V. How much electric energy is lost in the process? Answer in units of J.
A long solenoid has a radius of 4 cm and has 800 turns/m. If the current in the solenoid is increasing at the rate of 21.4 A/s, what is the magnitude of the induced electric field at a point 2.2 cm from the axis of the solenoid? a. 192.60 µV/m b. 321.00 µV/m O c. 781.10 µV/m d. 1719.70 μν /m e. 236.47 µV/m
A circular loop with a radius of 2.5 m rests horizontally inside a uniform magnetic field of 0.9 T in a down direction. What is the induced emf when the magnetic field drops to zero in 0.75 s? O a. 9.40 V O b. 23.6 V O c. 34.2 V O d. 17.5 V
2. A 0.5 m wire is moved AT AN ANGLE OF 250 to a 2.7 T magnetic field at a speed of 8.4 m/s. What emf is induced across the ends of the wire?
3.
2. A segment of wire 7.9 cm long is moving at a velocity of 4.75 m/s toward a parallel (much longer) wire which carries a current of 3.83 A. At a particular instant the wire segment is 5.0 cm away from the long, current-carrying wire. What is the induced emf (voltage) between the two ends of the wire segment? 2.30E-06 V 4.03E-06 V 6.90E-06 V 5.75E-06 V
5. A jet airplane with a 75.0 m wingspan is flying at 280 m/s. What emf is induced between wing tips if the vertical component of the Earth's field is 3.00 x 10-5 T? 6. As shown in the figure, a wire and a 10-N resistor are used to form a circuit in the shape of a square with dimensions 20 cm by 20 cm. A uniform but non-steady magnetic field is directed into the plane of the circuit. The magnitude of the magnetic field is steadily decreased from 2.70 T to 0.90 T in a time interval of 96 ms. What is the induced current in the circuit, and what is its direction through the resistor? - 20 cm → 20 cm ww a 10 Ω X X X X X X
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 motional emf problem. [Answers: (a) & = 0.88 V, (b) ccw, (c) I = 0.088 A] 0 0