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Saturday, 31 October

JEE Main 2021 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 26 February 2021, Shift 1, Physics Q7

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

The normal density of a material is ρ\rho and its bulk modulus of elasticity is K. The magnitude of increase in density of material, when a pressure P is applied uniformly on all sides, will be :
  1. (1)ρPK\frac{\rho P}{K}Official answer
  2. (2)KρP\frac{K}{\rho P}
  3. (3)ρKP\frac{\rho K}{P}
  4. (4)PKρ\frac{PK}{\rho}

Official answer

Option 1

NTA final key.

Chapter
Mechanical Properties of Solids
Topic
Elasticity
Idea tested
Compressibility and Density Changes

Same idea in other shifts

Asked 2× in all
  1. 31 Aug 2021, Shift 1 · Q25When a rubber ball is taken to a depth of __________ m in deep sea, its volume decreases by 0.5%. (The bulk modulus of rubber =…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.