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Friday, 9 October

JEE Main 2023 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 13 April 2023, Shift 2, Physics Q55

Question 55 of 90 in this shift, Physics question 25 of 30, Section B.

Three point charges q, −2q-2q and 2q2q are placed on x-axis at a distance x=0x=0, x=34Rx=\frac{3}{4}R and x=Rx=R respectively from origin as shown. If q=2×10−6q=2\times10^{-6} C and R=2R=2 cm, the magnitude of net force experienced by the charge −2q-2q is ______ N.

The figure, in words

Charges on the x-axis: q at x=0 (origin), -2q at distance 3R/4 from origin, 2q at distance R from origin.

Official answer

5440

NTA final key.

Chapter
Electric Charges and Fields
Topic
Coulomb's Law
Idea tested
Superposition of Forces

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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 42 of the 174 JEE Main shifts held from 2017 to 2026.