Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-4>Q 11

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Let $E_{1} (r)$ , $E_{2} (r)$ , $E_{3} (r)$ , respectively, be the electric fields at distance $r$ from a point charge $Q$ , an infinitely long wire of linear charge density $λ$ and an infinite plane with uniform surface charge density $σ$ . If $E_{1} (r_{0}) = E_{2} (r_{0}) = E_{3} (r_{0})$ at a given distance $r_{0}$ , then

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Important Questions on Electrostatics

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-4>Q 12

In the Bohr model of a hydrogen atom, the centripetal force is furnished by the coulomb attraction between the proton and the electron. If

a_{0}

is the radius of the ground state orbit,

m

is the mass,

e

is the charge on the electron and

ε_{0}

is the vacuum permittivity, the speed of the electron is