Test Academy | An electron is moving with speed of 1 m/s at distance of 1 m from a large sheet of charge with density σ C/m 2 . Find maximum value of σ such that electron hit the sheet after 1 sec. (mass of electron 9 × 10 –31 kg, permittivity of free space ε 0 = 9 × 10 –12 C 2 /Nm 2 ) 4.05 × 10–22 C/m2, 8.10 × 10–22 C/m2, 4.05 × 1024 C/m2, 2.02 × 10

Question

An electron is moving with speed of 1 m/s at distance of 1 m from a large sheet of charge with density σ C/m² . Find maximum value of σ such that electron hit the sheet after 1 sec. (mass of electron 9 × 10^–31 kg, permittivity of free space ε₀ = 9 × 10^–12 C² /Nm²)

Options :

4.05 × 10^–22 C/m²
8.10 × 10^–22 C/m²
4.05 × 10²⁴ C/m²
2.02 × 10^–20 C/m²

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