Home › Bihar Board Class 12 (Commerce) › Mathematics › Vectors › A vector of magnitude 10 along 3i + 4j is
A vector of magnitude 10 along 3i + 4j is
A30i + 40j
B3i + 4j
C10i + 10j
D6i + 8j
Answer & Solution
Correct answer: D. 6i + 8j
The unit vector is (3i + 4j)/5, and multiplying by 10 gives 6i + 8j.
Related questions
In physics, the acceleration of a point is the time derivative of itsWho, with Heaviside, introduced the dot and cross notation for vector products in 1881?In vector analysis the magnetic field B is classed as aA tetrahedron has three mutually perpendicular edges i, j and k from one vertex. Its volumThe vectors i + j and j + k are adjacent sides of a parallelogram. Its area isFor any vector a, the cross product a × a equalsA vector of magnitude 4 is multiplied by the scalar -3. The magnitude of the result isThe direction cosine of i + j + k along the x-axis is