JEE Main 2023 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 6 April 2023, Shift 1, Physics Q46

Question 46 of 90 in this shift, Physics question 16 of 30, Section A.

Two 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 resistance when they are connected in parallel is -

(1)4.33Official answer
(2)6.33
(3)2.33
(4)5.33

Official answer

Option 1

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

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25 Jul 2022, Shift 2 · Q49The maximum error in the measurement of resistance, current and time for which current flows in an electrical circuit are 1%, 2% and 3%…EasySingle 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.