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A proton has mass m and charge q. It is suspended in electric and gravitational field. What is the magnitude of electric field?

Correct answer: A. E = mg / q

  • A. E = mg / q
  • B. E = mg / qv
  • C. E = mg / qvB
  • D. E = q / mg

Explanation

Electric force (F) = electric field (E) x charge (q) whereas weight = mass x gravitational field So E = mg / q

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About Electrostatics

Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.

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