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Friday, 9 October

JEE Main 2021 · PhysicsMultiple choiceMatch the listMediumDiagram reading

JEE Main 25 July 2021, Shift 1, Physics Q17

Question 17 of 90 in this shift, Physics question 17 of 30, Section A.

Match List I with List II. List I: (a) C⃗−A⃗−B⃗=0\vec{C}-\vec{A}-\vec{B}=0 (b) A⃗−C⃗−B⃗=0\vec{A}-\vec{C}-\vec{B}=0 (c) B⃗−A⃗−C⃗=0\vec{B}-\vec{A}-\vec{C}=0 (d) A⃗+B⃗=−C⃗\vec{A}+\vec{B}=-\vec{C} List II: (i) [figure: triangle with A pointing up on the left side, C along the top pointing right, B along the hypotenuse pointing up-right toward the top-right vertex] (ii) [figure: triangle with A along the bottom pointing right, B on the right side pointing up, C along the hypotenuse pointing down-left] (iii) [figure: triangle with A on the left side pointing down, C along the top pointing right, B along the hypotenuse pointing down-left] (iv) [figure: triangle with A along the top pointing right, C on the left side pointing down, B along the hypotenuse pointing down-left] Choose the correct answer from the options given below :

The figure, in words

List II entries are four vector triangles (i)-(iv) with arrows labelled A, B, C.
  1. (1)(a) →\to (iv), (b) →\to (iii), (c) →\to (i), (d) →\to (ii)Official answer
  2. (2)(a) →\to (iii), (b) →\to (ii), (c) →\to (iv), (d) →\to (i)
  3. (3)(a) →\to (iv), (b) →\to (i), (c) →\to (iii), (d) →\to (ii)
  4. (4)(a) →\to (i), (b) →\to (iv), (c) →\to (ii), (d) →\to (iii)

Official answer

Option 1

NTA final key.

Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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.