JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 25 July 2022, Shift 2, Physics Q49

Question 49 of 90 in this shift, Physics question 19 of 30, Section A.

The maximum error in the measurement of resistance, current and time for which current flows in an electrical circuit are 1%, 2% and 3% respectively. The maximum percentage error in the detection of the dissipated heat will be :

(1)2
(2)4
(3)6
(4)8Official 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 7× in all

5 Apr 2026, Shift 2 · Q27In 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…EasySingle correct
29 Jan 2024, Shift 1 · Q31The resistance $R=\frac{V}{I}$ where $V=(200\pm5)$ V and $I=(20\pm0.2)$ A, the percentage error in the measurement of R is :EasySingle correct
6 Apr 2023, Shift 1 · Q46Two resistances are given as $R_1=(10\pm0.5)\,\Omega$ and $R_2=(15\pm0.5)\,\Omega$ . The percentage error in the measurement of equivalent…MediumSingle correct
25 Jun 2022, Shift 2 · Q51For $z =a^2x^3y^{\frac{1}{2}}$ , where ‘ $a$ ’ is a constant. If percentage error in measurement of ‘ $x$ ’ and ‘ $y$ ’ are 4% and 12%,…EasyNumerical value
27 Jun 2022, Shift 1 · Q33A silver wire has a mass $(0.6\pm0.006)$ g, radius $(0.5\pm0.005)$ mm and length $(4\pm0.04)$ cm. The maximum percentage error in the…EasySingle correct
5 Sep 2020, Shift 1 · Q1A physical quantity $z$ depends on four observables a, b, c and d, as $z = \frac{a^2 b^{\frac{2}{3}}}{\sqrt{c}\, d^3}$ . The percentages of…EasySingle 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 108 of the 174 JEE Main shifts held from 2017 to 2026.