An infinite non conducting sheet having charge density σ and there is a small hole as shown in figure and there is rod of length λ having linear charge density λ and hinged in the hole as shown. If the mass of rod is m then time period of oscillation for small angular displacement

Question

Examsnet · Accepted Answer

Correct Answer is :  2π√‌2m∈03σλ

JEE Advanced 2020 Full Test 7 Paper 2