Vector Algebra Question 213
Question: The position vectors of two points A and B are $ \mathbf{i}+\mathbf{j}-\mathbf{k} $ and $ 2\mathbf{i}-\mathbf{j}+\mathbf{k} $ respectively. Then $ |\overrightarrow{AB}|= $
[BIT Ranchi 1992]
Options:
A) 2
B) 3
C) 4
D) 5
Show Answer
Answer:
Correct Answer: B
Solution:
- $ \overrightarrow{AB}=\mathbf{i}-2\mathbf{j}+2\mathbf{k}\Rightarrow |\overrightarrow{AB}|=3. $
BETA
