Part A A fixed 17.1-cm-diameter wire coil is perpendicular to a magnetic field 0 49 T pointing up In 0 28 s the field is changed to 0 18 Tpointing down. What is the average induced emf in the coil? Express your answer to two significant figures and include the appropriate units. Talue Units Submit Request Answer

Part A A fixed 17.1-cm-diameter wire coil is perpendicular to a magnetic field 0 49 T pointing up In 0 28 s the field is changed to 0 18 Tpointing down. What is the average induced emf in the coil? Express your answer to two significant figures and include the appropriate units. Talue Units Submit Request Answer

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter23: Electromagnetic Induction, Ac Circuits, And Electrical Technologies

Section: Chapter Questions

Problem 9PE: (a) An MRI technician moves his hand from a region of very low magnetic field strength into an MRI...

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(a) An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 2.00 T field with his fingers pointing in the direction of the field. Find the average emf induced in his wedding ling, given its diameter is 2.20 cm and assuming it takes 0.250 s to move it into the field. (b) Discuss whether this current would significantly change the temperature of the ring.
A loop of wire is moving near a long, straight wire carrying a constant current I as shown in Figure CQ31.10. (a) Determine the direction of the induced current in the loop as it moves away from the wire. (b) What would be the direction of the induced current in the loop if it were moving toward the wire?
A coil of area 0.100 m2 is rotating at 60.0 rev/s with the axis of rotation perpendicular to a 0.200-T magnetic field. (a) If the coil has 1 000 turns, what is the maximum emf generated in it? (b) What is the orientation of the coil with respect to the magnetic field when the maximum induced voltage occurs?
How do the multiple-loop coils and iron ring in the version of Faraday's apparatus shown in Figure 23.3 enhance the observation of induced emf?
Integrated Concepts A 200-turn flat coil of wire 30.0 cm in diameter acts as an antenna for FM radio at a frequency of 100 MHz. The magnetic field of the incoming electromagnetic wave is perpendicular to the coil and has a maximum strength of 1.001012T. (a) What power is incident on the coil? (b) What average emf is induced in the coil over one-fourth at a cycle? (c) If the radio receiver has an inductance at 2.50 (H, what capacitance must it have to resonate at 100 MHz?
A rectangular copper loop of mass 100 g and resistance 0.2 is in a region of uniform magnetic field that is perpendicular to the area enclosed by the ring and horizontal to Earth's surface (see below). The loop is let go from rest what it is at the edge of the nonzero magnetic field region. (a) Find an expression for the speed when the loop just exits the region of uniform magnetic field. (b) If it was let go at t = 0, what is the tune when it exits the region of magnetic field for the following values, a=25cm,b=50cm,B=3T,g=9.8m/s2 ?Assumethat the magnetic field of the induced current is negligible compared to 3 T.
A rectangular conducting loop is placed near a long wire carrying a current I as shown in Figure OQS1.3. If I decreases in time, what can be said of the current induced in the loop? (a) The direction of the current depends on the size of the loop. (b) The current is clockwise. (c) The current is counterclockwise. (d) The current is zero. (e) Nothing can he said about the current in the loop without more information.
FIGURE 3 shows a bar magnet falling through a flat circular coil with a diameter of 0.51 cm. Using Lenz's Law, I) determine the direction of the induced current in the coil viewed from above when the magnet is entering the coil. ii)State the change in magnetic flux iii)If the magnetic field experiences by the coil is increase from 0.05 T to 0.13 T in 0.50 s, determine the induced emf in the coil
FIGURE 3 shows a bar magnet falling through a flat circular coil with a diameter of 0.51 cm. Using Lenz's Law, (i) determine the direction of the induced current in the coil viewed from above when the magnet is entering the coil. (ii) State the change in magnetic flux. (iii) If the magnetic field experiences by the coil is increase from 0.05 T to 0.13 T in 0.50 s, determine the induced emf in the coil.
CAN YOU HELP WITH 4A AND SUBQUESTION 4B PLEASE 4a. Suppose a 42–turn coil lies in the plane of the page in a uniform magnetic field that is directed into the page. The coil originally has an area of 0.290 m2. It is stretched to have no area in 0.100 s. What is the magnitude of the induced emf if the uniform magnetic field has a strength of 1.70 T? 4b. What is the direction of induced emf? A. CCW B. CW THIS IS NOT AND WILL NOT BE GRADED
1. A flat, square coil of 20 turns that has sides of length 15.0 cm is rotating in a magnetic fieldof strength 0.050 T. If the maximum emf produced in the coil is 30.0 mV, what is the angularvelocity of the coil? This is not and will not graded
A 2cm by 2cm square coil is in a 1.0 T magnetic field as shown below. The coil is pulled out of the field with a constant velocity of 2 m/s. a. At what point is an emf induced? Why? b. What is the value of the induced emf? (See attached diagram)