4. In a uniform electric field near the surface of the Earth, a particle having a charge of - 2.0× 10-° C is acted on by a downward electric force of 3.0× 10-“ N. (a) Find the mag- nitude of the electric field. (b) What is the magnitude and direction of the electric force exerted on a proton placed in this field? (c) What is the gravitational force on the proton? (d) What is the ratio of the electric force to the gravitational force in this case?

4. In a uniform electric field near the surface of the Earth, a particle having a charge of - 2.0× 10-° C is acted on by a downward electric force of 3.0× 10-“ N. (a) Find the mag- nitude of the electric field. (b) What is the magnitude and direction of the electric force exerted on a proton placed in this field? (c) What is the gravitational force on the proton? (d) What is the ratio of the electric force to the gravitational force in this case?

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter23: Electric Fields

Section: Chapter Questions

Problem 23.14OQ: An object with negative charge is placed in a region of space where the electric field is directed...

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