Understanding Electric Fields: Measuring the Electric Field at a Point P

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SUMMARY

The discussion focuses on measuring the electric field at a point P near a negatively charged metallic ball. The method involves placing a positive charge q at point P and calculating the electric field using the formula E = F/q. The conclusion drawn is that the electric field at point P is less than the force per unit charge, represented as E < F/q, due to the nature of electric fields produced by negative charges.

PREREQUISITES
  • Understanding of electric fields and point charges
  • Familiarity with Coulomb's Law
  • Knowledge of force and charge interactions
  • Basic principles of electrostatics
NEXT STEPS
  • Study the concept of electric field lines and their direction
  • Learn about the superposition principle in electric fields
  • Explore the effects of different charge distributions on electric fields
  • Investigate the relationship between electric field strength and distance from a charge
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone interested in understanding electrostatics and electric field measurements.

shashankdubey
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Homework Statement


A negatively charged metallic ball is supported on an insulating stand.We wish to measure the electric field at a point P in the same horizontal level as that of the metallic ball.To do so,we put a positive charge q and measure F/q.The electric field at the point P is
a)=F/q
b)<F/q
c)>F/q

the answer given is <F/q...i can't understand how..


Homework Equations





The Attempt at a Solution

 
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The electric field of a point charge or a charged ball is considered positive if it points away from the charge. The electric field around a negative charge is negative. If F is the magnitude of force than E=-F/q.

ehild
 

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