JEE Main 2023 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 6 April 2023, Shift 2, Physics Q38

Question 38 of 90 in this shift, Physics question 8 of 30, Section A.

A 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 after the next 7 minutes will be:

(1) $28^\circ$ COfficial answer
(2) $30^\circ$ C
(3) $32^\circ$ C
(4) $34^\circ$ C

Official answer

Option 1

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

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
22 Jul 2021, Shift 2 · Q23In 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 ________…MediumNumerical value

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.