Class 11

3-1.Vectors question bank (Physics)

Practice 687 free Class 11 Physics - 3-1.Vectors questions with answers and step-by-step solutions.

Start free Book a demo

All Easy Hard Medium

Q1.

If $A = 3\hat i + 4\hat j$ and $B = 7\hat i + 24\hat j,$ the vector having the same magnitude as $B$ and parallel to $A$ is

(A)

$5\hat i + 20\hat j$

(B)

$15\hat i + 10\hat j$

(C)

$20\hat i + 15\hat j$

(D)

$15\hat i + 20\hat j$

Show answer & solution

Verified Answer & Solution Locked

Q2.

If $\overrightarrow A = 2\hat i + 4\hat j - 5\hat k$,the direction cosines of the vector $\overrightarrow A$ are:

(A)

$\frac{2}{\sqrt{45}}, \frac{4}{\sqrt{45}}, \text{and } \frac{-5}{\sqrt{45}}$

(B)

$\frac{1}{\sqrt{45}}, \frac{2}{\sqrt{45}}, \text{and } \frac{3}{\sqrt{45}}$

(C)

$\frac{4}{\sqrt{45}}, 0, \text{and } \frac{4}{\sqrt{45}}$

(D)

$\frac{3}{\sqrt{45}}, \frac{2}{\sqrt{45}}, \text{and } \frac{5}{\sqrt{45}}$

Show answer & solution

Verified Answer & Solution Locked

Protected Questions

Log in or sign up free to access every question with complete solutions, create chapter practice tests, and track your performance.

Sign up free to access all 360 questions

Unlock every 3-1.Vectors question, generate papers, and practice at your own pace.