CBSE 12th Standard Maths Subject Vector Algebra Ncert Exemplar MCQ Questions With Solution 2021
By QB365
QB365 Provides the updated NCERT Examplar Questions for Class 12 Maths, and also provide the detail solution for each and every ncert examplar questions , QB365 will give all kind of study materials will help to get more marks
QB365 - Question Bank Software
CBSE 12th Standard Maths Subject Vector Algebra Ncert Exemplar MCQ Questions With Solution 2021
12th Standard CBSE
-
Reg.No. :
Maths
-
The magnitude of the vector \(6 \hat{i}+2 \hat{j}+3 \hat{k}\) is
(a)5
(b)7
(c)12
(d)1
-
The vector having initial and terminal points as \((2,5,0) \text { and }(-3,7,4)\) respectively is
(a)\(-\hat{i}+12 \hat{j}+4 \hat{k}\)
(b)\(5 \hat{i}+2 \hat{j}-4 \hat{k}\)
(c)\(-5 \hat{i}+2 \hat{j}+4 \hat{k}\)
(d)\(\hat{i}+\hat{j}+\hat{k}\)
-
If \(\boldsymbol{\theta}\) is the angle between two vectors \(\vec{a} \text { and } \vec{b},\) then \(\vec{a} \cdot \vec{b} \geq 0\) only when
(a)\(0<\theta<\frac{\pi}{2}\)
(b)\(0 \leq \theta \leq \frac{\pi}{2}\)
(c)\(0<\theta<\pi\)
(d)\(0 \leq \theta \leq \pi\)
-
The value of \(\lambda\) for which the vectors \(\vec{a}=2 \hat{i}+\lambda \hat{j}+\hat{k} \text { and } \vec{b}=\hat{i}+2 \hat{j}+3 \hat{k}\) are orthogonal os
(a)0
(b)1
(c)\(\frac{3}{2}\)
(d)\(\frac{-5}{2}\)
-
If \(|\vec{a}|=10,|\vec{b}|=2\) and \(\vec{a} \cdot \vec{b}=12\) 12, then the value of \(|\vec{a} \times \vec{b}|\) is
(a)5
(b)10
(c)14
(d)16
1 Marks
