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)...

See similar textbooks

Similar questions

The square conducting loop shown in the figure lies in the x-y plane. The loop is in a uniform magnetic field at a particular instant and the field that points into the paper/screen. The magnitude of the magnetic field begins to decrease at a rate of 5.9 T/s. What is the induced electric current (in A) in the loop? Assume the resistance is 97.7 Ω and the length of each side of the loop is 3.4 m.
A flexible circular loop 8.00 cm in diameter lies in a magnetic field with magnitude 2 T, directed into the plane of the page in the figure. The loop is pulled at the points indicated by the arrows, forming a loop of zero area in 0.300 s. Find the average induced emf in the circuit. What is the direction of the induced magnetic field What is the direction of the induced current in R? (From a to b or b to a) If you rotate the circular loop as the top part out of page, what is the direction of the induced current in R? (From a to b or b to a) If you move the circular loop inside the magnetic field with a constant velocity toward the right, what is the direction of the induced current in R? (From a to b or b to a)
A circular loop of wire lies in a plane perpendicular to a magnetic field. The magnetic field has a magnitude of 1.3 T and points out of the page as shown in the figure. The radius of the loop is 18 cm and it has a resistance of 3.2 Ω. Find the induced emf in the loop of wire if the magnetic field doubles in magnitude in 1 seconds. What is the induced current in the loop? In which direction is the induced current?
A long straight (line) conductor carries a current i that increases at a rate di/dt. Below this current-carrying conductor is a rectangular conductor as shown in the figure below. Given that a/b = 4 and assuming that the dimensions of the rectangular conductor are small enough to experience an almost instantaneous change in the magnetic field due to the current change in the long current-carrying conductor above it, what is the magnitude of the induced emf in the rectangular conductor? 1 HoL di (A) 42 4T dt HoL di (B) In (1+ 27 dt -(1+ ) HoL di (C) 4т de HọL di (D) In (1+4) 27 dt (E) 4²40L di 4x dt
Q1.. Explain Faraday's law of induction and Lenz's Laws. The magnetic flux passes perpendicular to the plane of the circuit and is directed into the paper. If the magnetic flux varies with respect to time as per the following relation: B = (2t³ +3t2 + 8t +5) mWb, what is the magnitude of the induced emf in the loop when t= 3 s? Find out the direction of current through the circuit. X X XX www
A metal rod moves with constant velocity along two parallel metal rails connected with strip of metal at one side as shown in Figure. A magnetic field B = 0.35 T points outof the page. If the rails are separated by distance ZL = 25 cm and the speed of the rod isv= 55 cm/s, find a) the induced emf and direction of induced currentb) the amount of heat released in this system in 3 min if the rod has resistance of 18 Qand the rails have negligible resistance.
A loop of wire sits in an external magnetic field as shown (in other words, the field shown in the picture is NOT a field created by the loop). The loop has a radius of 2.8 m. If the external magnetic field changes from 5.5 T to 11 T in 6.1 s, what is the magnitude of the induced emf in the loop? a. 2.22×101 V b. 2.22×101 V c. 1.59×101 V d. 4.44×101 V e. 7.07 V
A 10-turn square coil of side 15.0 cm sits in a time varying magnetic field given as B(t) = B Sin (ao t); B= 0.5 T, @=120 Hz a. Find the magnitude of the induced voltage in the coil as a function of time. b. What is the maximum induced volatge possible in this arrangement?
The figure below shows a rectangular, conducting loop sitting in the magnetic field of a straight wire carrying a current I. When the current I varies in time, a current is induced in the loop. Let’s assume that the current I in the straight wire decreases in time. It is observed that the induced current circulates clockwise in the loop.Use Faraday’s Law and Lenz’s Law to explain: a) Why a current is induced in the loop,b) Why the induced current circulates clockwise in the loop.
fiexible loop of metal wire with a radius of 14.0 cm. It lies in a magnetic field pointing into the page with a magnitude of 0.190 T. A student grabs the loop at points A and B and rap The figure below shows pulls in opposite directions until the loop folds up, such that its area becomes zera. The change area occurs in a span of 0.150 s. B What is the average induced emf (in mV) in the loop over this time span?
A fixed 13.3-cmcm-diameter wire coil is perpendicular to a magnetic field 0.59 TT pointing up. In 0.19 ss , the field is changed to 0.27 TT pointing down. What is the average induced emf in the coil? Express your answer to two significant figures and include the appropriate units. E= ?
0000000 ****000 What is the length of the rod? l= m 000 A rod is moving from left to right toward a resistor along two parallel conducting rails. The entire loop is inside a magnetic field oriented out of the page. The rod is moving at 70 and the induced emf in the loop is 12.0 V. The resistor has a resistance of 60 . What is the current through the rod? I = A D What is the magnitude of the Lorentz Force on the rod? F = N R m the magnetic field has a magnitude of 2.3 T, I S