What electric field strength will cause the bead to hang suspended in the air?

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SUMMARY

The discussion centers on calculating the electric field strength required to suspend a 0.180g plastic bead charged with 0.700 x 1010 excess electrons. The relevant formula is F = qE, where F is the force, q is the charge of the bead, and E is the electric field strength. By equating the electric force to the gravitational force (mg), participants confirm that the charge of the bead is derived from the excess electrons, leading to the conclusion that E = mg/q can be used to find the necessary electric field strength.

PREREQUISITES
  • Understanding of electric charge and Coulomb's law
  • Familiarity with basic physics concepts such as force and gravity
  • Knowledge of the formula F = qE
  • Ability to perform calculations involving mass and acceleration due to gravity
NEXT STEPS
  • Calculate the charge of the bead using the formula q = ne, where n is the number of excess electrons and e is the elementary charge (1.6 x 10-19 C).
  • Research the relationship between electric field strength and force in electrostatics.
  • Explore the concept of equilibrium in charged objects under the influence of electric fields.
  • Study the effects of varying electric field strengths on different materials.
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone interested in understanding electrostatics and the behavior of charged objects in electric fields.

cemar.
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1. A 0.180g plastic bead is charged by the addition of 0.700 x 10^10 excess electrons. What electric field strength will cause the bead to hang suspended in the air?



2. Is amount of excess electrons the exact same as the charge of the bead??



3. I am sure you use F=qE. But I am pretty stuck at the rest of it. I am sure there is a formula or soemthing i missed in lecture considering my prof is a little loopy.
 
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Set qE = mg. q is the charge of 0.7 * 10^10 electrons, m is the mass of the bead, g is acceleration due to gravity. Shouldn't be too hard.
 

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