Question

An electron is moving with the speed of \(1\) \(m/s\) at a distance of \(1\) \(m\), from a large sheet of charge with density \(σ\) \(C/m^2\). Find the maximum value of \(σ\) such that electron hits the sheet after \(1\) \(sec\). (mass of electron = \(9 × 10^{-31}\) kg, Permittivity of free space = \(9\times10^{12}\;C^2/Nm^2\)

• A. \(4.05\times10^{-22} \;C/m^2\)
• B. \(8.10\times10^{-22} \;C/m^2\)
• C. \(4.05\times10^{-24}\; C/m^2\)
• D. \(2.02\times10^{-20}\; C/m^2\)

Answer 1

The Correct Option is A

The correct option is (A): \(4.05\times10^{-22} \;C/m^2\)