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Friday, 9 October

JEE Main 2026 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 5 April 2026, Shift 2, Physics Q27

Question 27 of 75 in this shift, Physics question 2 of 25, Section A.

In an experiment to determine the resistance of a given wire using Ohm's law, the voltmeter and ammeter readings are noted as 10 V and 5 A, respectively. The least counts of voltmeter and ammeter are 500 mV and 200 mA, respectively. The estimated error in the resistance measurement is __________ Ω\Omega
  1. (1)0.250.25
  2. (2)22
  3. (3)2.52.5
  4. (4)0.180.18Official answer

Official answer

Option 4

NTA final key.

Chapter
Units and Measurements
Topic
Ohm's Law and Resistance
Idea tested
Error Analysis in Ohm's Law

Same idea in other shifts

Asked 3× in all
  1. 29 Jan 2024, Shift 1 · Q31The resistance R=VIR=\frac{V}{I} where V=(200±5)V=(200\pm5) V and I=(20±0.2)I=(20\pm0.2) A, the percentage error in the measurement of R is :EasySingle correct
  2. 6 Apr 2023, Shift 1 · Q46Two resistances are given as R1=(10±0.5) ΩR_1=(10\pm0.5)\,\Omega and R2=(15±0.5) ΩR_2=(15\pm0.5)\,\Omega. The percentage error in the measurement of equivalent…MediumSingle correct

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