JEE Main 2022 · PhysicsMultiple choiceDiagram basedEasyConceptual

JEE Main 25 June 2022, Shift 1, Physics Q38

Question 38 of 90 in this shift, Physics question 8 of 30, Section A.

In the figure, a very large plane sheet of positive charge is shown.

P_1

and

P_2

are two points at distance

l

and

2l

from the charge distribution. If

\sigma

is the surface charge density, then the magnitude of electric fields

E_1

and

E_2

P_1

and

P_2

respectively are :

The figure, in words

A large plane sheet drawn as a slanted rectangle covered with + signs, labelled sigma. Point P1 lies at distance l from the sheet and point P2 at distance 2l from the sheet; arrows E1 at P1 and E2 at P2 point away from the sheet, to the right.

(1) $E_1=\sigma/\varepsilon_0$ , $E_2=\sigma/2\varepsilon_0$
(2) $E_1=2\sigma/\varepsilon_0$ , $E_2=\sigma/\varepsilon_0$
(3) $E_1=E_2=\sigma/2\varepsilon_0$ Official answer
(4) $E_1=E_2=\sigma/\varepsilon_0$

Official answer

Option 3

NTA final key.

Chapter: Electric Charges and Fields
Topic: Electric Field
Idea tested: Field of an Infinite Non-Conducting Sheet

Same idea in other shifts

Asked 5× in all

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.