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Saturday, 31 October

JEE Main 2024 · PhysicsMultiple choiceTwo statementsMediumConceptual

JEE Main 4 April 2024, Shift 1, Physics Q37

Question 37 of 90 in this shift, Physics question 7 of 30, Section A.

Given below are two statements : Statement I : When speed of liquid is zero everywhere, pressure difference at any two points depends on equation P1−P2=ρg(h2−h1)P_1 - P_2 = \rho g(h_2 - h_1). Statement II : In ventury tube shown 2gh=v12−v222gh = v_1^2 - v_2^2 In the light of the above statements, choose the most appropriate answer from the options given below.

The figure, in words

Venturi tube (horizontal tube with a narrow middle section) with two vertical manometer limbs; liquid height difference h between the two limbs; v1 with P1, A1 at the wide section and v2 with P2, A2 at the narrow section.
  1. (1)Both Statement I and Statement II are correct.
  2. (2)Both Statement I and Statement II are incorrect.
  3. (3)Statement I is correct but Statement II is incorrect.Official answer
  4. (4)Statement I is incorrect but Statement II is correct.

Official answer

Option 3

NTA final key.

Chapter
Mechanical Properties of Fluids
Topic
Fluid Dynamics
Idea tested
Venturi Meter Principles

Same idea in other shifts

Asked 4× in all
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  2. 28 Jun 2022, Shift 2 · Q58A liquid of density 750 kgm−3^{-3} flows smoothly through a horizontal pipe that tapers in cross-sectional area from…MediumNumerical value
  3. 9 Jan 2020, Shift 1 · Q6Water flows in a horizontal tube (see figure). The pressure of water changes by 700 Nm−2700\ \mathrm{Nm^{-2}} between A and B where the area of…MediumSingle correctHas 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 108 of the 174 JEE Main shifts held from 2017 to 2026.