13. You have decided to use a magnetic field in combination with an electric field as a switch to either make a beam of electrons pass straight through a certain region of an apparatus or to curve 90° and go through an auxiliary portion of the apparatus. The beam of electrons travels to the right at a speed of 4.8 x 106 m/s and you designed the electric field (8400 V/m) to be oriented 10⁰ vertically up. a) When the electric field is on, what strength of B-field is necessary for the beam to travel un-deflected? (Note: You can ignore gravity.) b) What is the orientation of the B-field? c) When the electric field is turned off, how long does it take an electron to turn into the auxiliary apparatus?

13. You have decided to use a magnetic field in combination with an electric field as a switch to either make a beam of electrons pass straight through a certain region of an apparatus or to curve 90° and go through an auxiliary portion of the apparatus. The beam of electrons travels to the right at a speed of 4.8 x 106 m/s and you designed the electric field (8400 V/m) to be oriented 10⁰ vertically up. a) When the electric field is on, what strength of B-field is necessary for the beam to travel un-deflected? (Note: You can ignore gravity.) b) What is the orientation of the B-field? c) When the electric field is turned off, how long does it take an electron to turn into the auxiliary apparatus?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter26: Electromagnetism

Section26.1: Interactions Of Electric And Manetic Fields And Matter

Problem 2PP

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