A conducting bar sits on top of two parallel rails. A uniform magnetic field B is steady and directed to the right. The bar moves upward with velocity v. What is the polarity of the induced emf in terminals X and Y?

A conducting bar sits on top of two parallel rails. A uniform magnetic field B is steady and directed to the right. The bar moves upward with velocity v. What is the polarity of the induced emf in terminals X and Y?

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)...

See similar textbooks

Similar questions

The figure below shows a flexible loop of metal wire with a radius of 10.0 cm. It lies in a magnetic field pointing into the page with a magnitude of 0.130 T. An engineer grabs the loop at points A and B and rapidly pulls in opposite directions until the loop folds up, such that its area becomes zero. The change in area occurs in a span of 0.250 s. A В What is the average induced emf (in mV) in the loop over this time span? 16 What is the initial magnetic flux through the loop? If the loop's area goes to zero, what is the final flux? How is the change in flux and change in time related to the induced emf? Be careful with unit conversions. mV
A circular loop of wire has its radius shrink from 3 m to 1.5 m over 5 seconds. The area vector of the wire stays parallel with a magnetic field of magnitude 4 μT. What is the induced emf? 0 V 3.77e-6 V 0.94 V 1.70e-5 V
The flexible loop in the figure below has a radius of 11.0 cm and is in a magnetic field of magnitude 0.170 T. The loop is grasped at points A and B and stretched until its area is nearly zero. If it takes 0.190 s to close the loop, what is the magnitude of the average induced emf in it during this time interval? mV X x X X X x X x X x X A X X X B x Xx X X x X x X x X X
A straight wire carries a steady current / in a downward direction. A conducting bar touching two parallel conducting rails moves upward with velocity v. What is the polarity of the induced emf in terminals X and Y? X Y O X and Y are at the same potential. O X is positive and Y is negative. O Yis positive and X is negative.
I only need letters C,E,G,I Thanks
A segment of wire 7.9 cm long is moving at a velocity of 5.85 m/s toward a parallel (much longer) wire which carries a current of 9.92 A. At a particular instant the wire segment is 6.9 cm away from the long, current-carrying wire. What is the induced emf (voltage) between the two ends of the wire segment? 5.32E-06 V 1.06E-05 V 1.60E-05 V 1.33E-05 V
A coil of wire with 50 turns lies in the plane of the page and has an initial area of 0.310 m2. The coil is now stretched to have no area in 0.100 s. What is the magnitude and direction of the average value of the induced emf if the uniform magnetic field points into the page and has a strength of 1.25 T? Magnitude? ___ V Direction?
A circular coil of wire consisting of 200 turns, each with a radius 50 cm, is positioned perpendicularly to a uniform magnetic field that decreases its magnitude at a constant rate from 40.0 mT to 10.0 mT in 0.5 s. If the coil has a total resistance of 0.5 Q, what is the instantaneous emf and what is the magnitude of the induced current?
The figure below displays a circular loop of nickel wire in a uniform magnetic field pointing into the page. The radius of the loop is 11.0 cm and the magnitude of the field is 0.140 T. You grab points A and B and pull them in opposite directions, stretching the loop until its area is nearly zero, taking a time of 0.190 s to do so. What is the magnitude of the average induced emf in the loop (in mV) during this time? x X X X x mV X x x x x x A Ax x x x 90x B x x x x X x x X x
A 2.00×10-2 Ω square wire loop 40.0 cm on a side has its plane normal to a uniform magnetic field of magnitude B = 3.0 T. If you pull two opposite sides of the loop away from each other, the other two sides automatically draw toward each other, reducing the area enclosed by the loop.If the area is reduced to zero in a time of 0.30 s what is the average emf during this time interval? What is the average current during this time interval?
7
A single circular loop of wire of radius 0.25m is positioned in a uniform magnetic field of 0.25T that points out of the page. What is the magnitude of the average EMF induced in the loop if it's orientation changes from being in the plane of the page to out of/into the page over a time period of 0.59seconds?