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Saturday, 31 October

JEE Main 2023 · MathsMultiple choiceSingle correctMediumMulti-step

JEE Main 10 April 2023, Shift 1, Maths Q16

Question 16 of 90 in this shift, Maths question 16 of 30, Section A.

Let O be the origin and the position vector of the point P be −i^−2j^+3k^-\hat{i}-2\hat{j}+3\hat{k}. If the position vectors of the points A, B and C are −2i^+j^−3k^-2\hat{i}+\hat{j}-3\hat{k}, 2i^+4j^−2k^2\hat{i}+4\hat{j}-2\hat{k} and −4i^+2j^−k^-4\hat{i}+2\hat{j}-\hat{k} respectively, then the projection of the vector OP→\overrightarrow{OP} on a vector perpendicular to the vectors AB→\overrightarrow{AB} and AC→\overrightarrow{AC} is
  1. (1)73\frac{7}{3}
  2. (2)83\frac{8}{3}
  3. (3)33Official answer
  4. (4)103\frac{10}{3}

Official answer

Option 3

NTA final key.

Same idea in other shifts

Asked 2× in all
  1. 3 Aug 2021, Shift 2 · Q90Let a⃗=2i^+αj^+k^\vec{a} = 2\hat{i} + \alpha\hat{j} + \hat{k} and b⃗=βi^−5j^+γk^\vec{b} = \beta\hat{i} - 5\hat{j} + \gamma\hat{k}, where α\alpha, β\beta and…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.