Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Vector Algebra question

2025 · 2 Apr · Shift 2 · Q44
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Mathematics
  4. /Vector Algebra
  5. /2025 · 2 Apr · Shift 2 · Q44

Vector Algebra question

2025 · 2 Apr · Shift 2 · Q44

JEE MainMathematicsVector AlgebraMCQ+4 / −1
Let a→=2i^−3j^+k^, b→=3i^+2j^+5k^\overrightarrow{\mathrm{a}}=2 \hat{i}-3 \hat{j}+\hat{k}, \quad \overrightarrow{\mathrm{~b}}=3 \hat{i}+2 \hat{j}+5 \hat{k}a=2i^−3j^​+k^, b=3i^+2j^​+5k^ and a vector c→\overrightarrow{\mathrm{c}}c be such that (a⃗−c⃗)×b⃗=−18i^−3j^+12k^(\vec{a}-\vec{c}) \times \vec{b}=-18 \hat{i}-3 \hat{j}+12 \hat{k}(a−c)×b=−18i^−3j^​+12k^ and a⃗⋅c⃗=3\vec{a} \cdot \vec{c}=3a⋅c=3. If b⃗×c⃗=d⃗\vec{b} \times \vec{c}=\vec{d}b×c=d, then ∣a⃗⋅d⃗∣|\vec{a} \cdot \vec{d}|∣a⋅d∣ is equal to :
  1. A
    15
  2. B
    18
  3. C
    12
  4. D
    9
PreviousNext

More from Vector Algebra

  • Let a=i^+j^​+k^,b=3i^+2j^​−k^,c=λj^​+μk^ and d^ be a unit vector such that a×d^=b×d^ and c⋅d^=1. If c…2025 · Numerical
  • Let a=i^+2j^​+k^,b=3i^−3j^​+3k^,c=2i^−j^​+2k^ and d be a vector such that b×d=c×d and a⋅d=4. Then ∣(a×d)∣2…2025 · Numerical
  • Consider two vectors u=3i^−j^​ and v=2i^+j^​−λk^,λ>0. The angle between them is given by cos−1(27​5​​). Let v=v1​+v2​​…2025 · MCQ
  • Let the three sides of a triangle ABC be given by the vectors 2i^−j^​+k^,i^−3j^​−5k^ and 3i^−4j^​−4k^. Let G be the centroid of the triangle ABC. Then 6(∣AG∣2+∣BG∣2+∣CG∣2)…2025 · Numerical
  • Let the angle θ,0<θ<2π​ between two unit vectors a^ and b^ be sin−1(965​​). If the vector c=3a^+6b^+9(a^×b^), then the value of…2025 · MCQ
  • Let a and b be the vectors of the same magnitude such that ∣a+b∣−∣a−b∣∣a+b∣+∣a−b∣​=2​+1. Then ∣a∣2∣a+b∣2​ is :2025 · MCQ
  • Let a=i^+2j^​+k^ and b=2i^+j^​−k^. Let c^ be a unit vector in the plane of the vectors a and b and be perpendicular to a. Then such a vector c^…2025 · MCQ
  • Let c be the projection vector of b=λi^+4k^,λ>0, on the vector a=i^+2j^​+2k^. If ∣a+c∣=7, then the area of the parallelogram formed by the vectors b…2025 · Numerical