AP EAPCET 06-Jul-2022 Shift 1 Paper

Given, An infinite non conducting sheet having surface charge density, σ=7×10−7C∕m2,
Potential difference, V=19.8V
We know that, for a charge non-conducting surface electric field is given by
E=‌

σ

2ε0

....(i)
and ‌‌V=El
∴‌‌E=V∕l......(ii)
Using Eq. (ii) in Eq. (i)
‌‌

V

l

‌=‌

σ

2ε0

⇒l=‌

2Vε0

σ

⇒l‌=‌

2×19.8×8.85×10−12

7×10−7

⇒l=50.06×10−5
⇒l‌=0.5‌mm