JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 4 April 2024, Shift 1, Physics Q41

Question 41 of 90 in this shift, Physics question 11 of 30, Section A.

The resistances of the platinum wire of a platinum resistance thermometer at the ice point and steam point are

8\ \Omega

and

10\ \Omega

respectively. After inserting in a hot bath of temperature

400^\circ

C, the resistance of platinum wire is :

(1) $8\ \Omega$
(2) $10\ \Omega$
(3) $16\ \Omega$ Official answer
(4) $2\ \Omega$

Official answer

Option 3

NTA final key.

Chapter: Current Electricity
Topic: Ohm's Law and Resistance
Idea tested: Temperature Coefficient of Resistance

Same idea in other shifts

Asked 7× in all

8 Apr 2024, Shift 1 · Q56Resistance of a wire at $0\,^\circ$ C, $100\,^\circ$ C and $t\,^\circ$ C is found to be $10\ \Omega$ , $10.2\ \Omega$ and $10.95\ \Omega$ …MediumNumerical value
9 Apr 2024, Shift 2 · Q55At room temperature ( $27^\circ$ C), the resistance of a heating element is $50\ \Omega$ . The temperature coefficient of the material is…EasyNumerical value
30 Jan 2024, Shift 1 · Q41An electric toaster has resistance of 60 $\Omega$ at room temperature ( $27\,^\circ\mathrm{C}$ ). The toaster is connected to a 220 V…MediumSingle correct
12 Apr 2023, Shift 1 · Q57The current flowing through a conductor connected across a source is 2 A and 1.2 A at $0^\circ$ C and $100^\circ$ C respectively. The…MediumNumerical value
15 Apr 2023, Shift 1 · Q50Given below are two statements: Statement I : The equivalent resistance of resistors in a series combination is smaller than least…EasyTwo statements
28 Jun 2022, Shift 2 · Q41Resistance of the wire is measured as 2 Ω and 3 Ω at 10°C and 30°C respectively. Temperature co-efficient of resistance of the material 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.