A circular loop of wire sits face on to a 2-tesla magnetic field that points into the page, as shown in the upper diagram at right. The wire loop is turned a quarter turn by a crank, so that the right edge of the loop drops into the page and the left side of the loop comes out of the page. The radius of the loop is 20 cm and the quarter turn takes 0.5 seconds. a) What is the average emf induced in the loop, and does the cur- rent in the wire flow in the direction of the arrow on the loop or in the opposite direction? b) If the crank continues to turn the loop another quarter turn in 0.5 seconds in the same direction, until it looks like the bottom picture, what will be the average emf induced in the wire, and does the current in the wire flow in the direction of the arrow or in the opposite direction? @

A circular loop of wire sits face on to a 2-tesla magnetic field that points into the page, as shown in the upper diagram at right. The wire loop is turned a quarter turn by a crank, so that the right edge of the loop drops into the page and the left side of the loop comes out of the page. The radius of the loop is 20 cm and the quarter turn takes 0.5 seconds. a) What is the average emf induced in the loop, and does the cur- rent in the wire flow in the direction of the arrow on the loop or in the opposite direction? b) If the crank continues to turn the loop another quarter turn in 0.5 seconds in the same direction, until it looks like the bottom picture, what will be the average emf induced in the wire, and does the current in the wire flow in the direction of the arrow or in the opposite direction? @

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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Concept explainers

Bar Magnet

In physics, magnetism is a phenomenon exhibited by a magnetic substance that exerts either attractive or repulsive force. A bar magnet is either a rectangular or round and hollow fit comprised of ferromagnetic materials and has a fanciful attractive field surrounded by it.

Question

A circular loop of wire sits face on to a 2-tesla magnetic field
that points into the page, as shown in the upper diagram at right. The
wire loop is turned a quarter turn by a crank, so that the right edge of
the loop drops into the page and the left side of the loop comes out of
the page. The radius of the loop is 20 cm and the quarter turn takes
0.5 seconds.
a) What is the average emf induced in the loop, and does the cur-
rent in the wire flow in the direction of the arrow on the loop or in
the opposite direction?
b) If the crank continues to turn the loop another quarter turn
in 0.5 seconds in the same direction, until it looks like the bottom
picture, what will be the average emf induced in the wire, and does
the current in the wire flow in the direction of the arrow or in the
opposite direction?
8
e
&
80
8

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