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At what speed must an electron revolve a...

At what speed must an electron revolve around the nucleus of hydrogen atom so that it may not be pulled into the nucleus by electrostatic attraction? Given, mass of electron `=9.1xx10^(-31) kg`, radius of orbit `=0.5xx10^(-10)m and e=1.6xx10^(-19)C.`

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The correct Answer is:
`2.25 xx 10^(6) ms^(-1)`
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At what speed should the electron revolve around the nucleus of a hydrogen atom in order that it may not be pulled into the nucleus by electrostatic attraction ? Take the radius of orbit of an electron as 0.5Å , the mass of the electron as 9.1xx10^(-31) kg and charge as 1.6xx10^(-19)C .

Radius of the fourth orbit in hydrogen atom is 0.85 nm. Calculate the velocity of the electron in this orbit (mass of electron = 9.1 xx 10^(-31) kg) .

An electron revolves around the nucleus of an atom in a circular orbit of radius 4 Å with a speed of 6.0 xx 10^(6) m//s . If mass of electron is 9.0 xx 10^(-31) kg , what is its angular momentum ?

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An X- ray tube operates at 27 kV . Find the maximum speed of an electron striking the anticathode. Given mass of electron =9xx10^(31)kg and charge on electron =1.6xx10^(-19)C .

The voltage across the electrodes of a cathode ray tube is 1000 V . Calculate the speed of the electron. Given mass of an electron =.1xx10^(-31)kg and charge on electron =1.6xx10^(16)C .

An electron revolves around the nucleus of an atom in a circular orbit of radius 4 Å with a speed of 5xx 10^(6)m//s . What is the angular momentum of the electron ? [ m_(e) = 9 xx 10^(-31) kg ].

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