sics Book"eling up$9 thingI eoliosqboit B srl to nollneti srl al ferWA beam of electrons is traveling to the right.Point A is above the beam, as shown.°into the pagegnetic fieldaveling inelectron beam50. What is the direction of the electric field atpoint A?A. Up the page.B. Down the page.C. Into the page.D. Out of the page.51. What is the direction of the magnetic fieldat point A?A. Into the page.B. Out of the page.C. To the right.D. To the left.down.A current I is flowing through a wire loop asshown.irest?Point P is in the middle of the loop.53. What is the direction of the magnetic fieldat point P?A. Out of the page.B. Into the page.C. To the right.D. To the left.54. If a proton is at point P and moving upward(1), what is the direction of the accelerationof the proton?A. To the left.B. To the right.C. Up, that is, speeding up the proton.D. Down, that is, slowing down the proton.CS Scanned with CamScanner

For the direction of the electric field at point A: 1. The beam of electrons is traveling to the…

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Stars and Galaxies

9th Edition

ISBN:9781305120785

Author:Michael A. Seeds, Dana Backman

Publisher:Michael A. Seeds, Dana Backman

Chapter10: The Interstellar Medium

Section: Chapter Questions

Problem 3DQ

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Check Your Understanding In what orientation would a magnetic dipole have to be to produce (a) a maximum torque in a magnetic field? (b) A maximum energy of the dipole?
(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) What happens to a ferromagnetic material when it is placed in a magnetic field?
An electron in a TV CRT moves with a speed at 6.00107m/s, in a direction perpendicular to the Earth’s field, which has a strength of 5.00105T. (a) What strength electric field must be applied perpendicular to the Earth’s field to make the election moves in a straight line? (b) If this is done between plates separated by 1.00 cm, what is the voltage applied? (Note that TVs are usually surrounded by a ferromagnetic material to shield against external magnetic fields and avoid the need for such a correction.)
An electron moving with a velocity v=(4.0i+3.0j+2.0k)106m/s enters a region where there is a uniform electric field and a uniform magnetic field. The magnetic field is given by v=(1.0i2.0j+4.0k)102T. If the electron travels through a region without being deflected, what is the electric field?
An incandescent light bulb emits only 2.6 W of its power as visible light. What is the rms electric field of the emitted light at a distance of 3.0 m from the bulb?
Check Your Understanding A straight, flexible length of copper wire is immersed in a magnetic field that is directed into the page, (a) If the wire's arrent runs in the +x-direction, which way will the wire bend? (b) Which way will the wire bend if the current nms in the -x-direction?
A conducting sheet lies in a plane perpendicular to a magnetic field B that is below the sheet. If B oscillates at a high frequency and the conductor is made of a material of low resistivity, the region above the sheet is effectively shielded from B . Explain why. Will the conductor shield this region from static magnetic fields?
Check your Understanding Repeat the calculations from the previous example for I0=0.040A .
Repeat the previous problem, but with the loop lying flat on the ground with its current circulating counterclockwise (when viewed from above) in a location where Earth’s field is north, but at an angle 45.0° below the horizontal and with a strength of 6.0105T.
An electron in a TV CRT moves with a speed of 6.0107 m/s, in a direction perpendicular to Earth's field, which has a strength of 5.0105 T. (a) What strength electric field must be applied perpendicular to the Earth’s field to make the election moves in a straight line? (b) If this is done between plates separated by 1.00 cm, what is the voltage applied? (Note that TVs are usually surrounded by a ferromagnetic material to shield against external magnetic fields and avoid the need for such a collection,)
(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) . Explain how electromagnetic waves are a natural outcome of the principles of electromagnetism.
On its highest power setting, a microwave oven increases the temperature of 0.400 kg of spaghetti by 45.0°C in 120 s. (a) What was the rate of energy absorption by the spaghetti, given that its specific heat is 3.76103J/kg.C ? Assume the spaghetti is perfectly absorbing. (b) Find the average intensity of the microwaves, given that they are absorbed over a circular area 20.0 cm in diameter. (C) What is the peak electric field strength of the microwave? (d) What is its peak magnetic field strength?

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