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If mass of the electron = …

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If mass of the electron = 9.1 x 10−Kg. Charge on the electron = 1.6 x 10− coulomb and g= 9.8 ?/?. Then the intensity of the electric field required to balance the weight of an electron is 5.6 x 10−?/? 5.6 x 10−?/? 5.6 x 10−?/? 5.6 x 10−7 ?/?

Posted by Ayush Vishwakarma?? 5 years, 3 months ago

CBSE > Class 12 > Physics

1 answers

Rohit Krishna 5 years, 3 months ago

If the intensity of the electric field balances the weight of the electron, use the equation qE = mg. where q is the charge, E is the electric field at that area, m is the mass of electron and g is the acceleration due to gravity. Substituting the values given in the question to the corresponding ones in the equation , you will get the answer as 5.6 × 10 ^ –12 N/C ( Note that in an entrance point of view,you can take 10 instead of 9.8 for g and if it is given as 9.8 m/s^2 in the question only,you have to take accordingly.But in this case if you substitute 9.8 in the equation as given in the question, you will be just close to the answer.For the actual answer you have to substitute 10 for the correct answer.)

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