JEE Main 2021 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 22 July 2021, Shift 2, Physics Q23

Question 23 of 90 in this shift, Physics question 23 of 30, Section B.

In 5 minutes, a body cools from 75°C to 65°C at room temperature of 25°C. The temperature of body at the end of next 5 minutes is ________ °C.

Official answer

NTA final key.

Chapter: Thermal Properties of Matter
Topic: Thermal Radiation
Idea tested: Newton's Law of Cooling

Same idea in other shifts

Asked 3× in all

6 Apr 2023, Shift 2 · Q38A body cools in 7 minutes from $60^\circ$ C to $40^\circ$ C. The temperature of the surrounding is $10^\circ$ C. The temperature of the body…MediumSingle correct
27 Jul 2022, Shift 1 · Q38Read the following statements : A. When small temperature difference between a liquid and its surrounding is doubled, the rate of loss of…MediumOther

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.