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Friday, 9 October

JEE Main 2021 · PhysicsMultiple choiceSingle correctMediumData or graph

JEE Main 25 July 2021, Shift 1, Physics Q14

Question 14 of 90 in this shift, Physics question 14 of 30, Section A.

Two different metal bodies A and B of equal mass are heated at a uniform rate under similar conditions. The variation of temperature of the bodies is graphically represented as shown in the figure. The ratio of specific heat capacities is :

The figure, in words

Graph of temperature T (C) vs time t (s). Body A rises linearly from origin to 120 C at t=3 s then stays flat at 120 C; body B rises linearly from origin to 90 C at t=6 s then stays flat at 90 C. Gridlines at 30, 60, 90, 120, 150 C and t=1..8 s.
  1. (1)83\frac{8}{3}
  2. (2)43\frac{4}{3}
  3. (3)34\frac{3}{4}
  4. (4)38\frac{3}{8}Official answer

Official answer

Option 4

NTA final key.

Chapter
Thermal Properties of Matter
Topic
Calorimetry
Idea tested
Heating and Cooling Curves

Same idea in other shifts

Asked 2× in all
  1. 30 Jan 2024, Shift 2 · Q37A block of ice at −10∘C-10^\circ C is slowly heated and converted to steam at 100∘C100^\circ C. Which of the following curves represent the…EasyDiagram basedHas a figure

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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.