1 . A⇀ =6i^-3j^+2k^

• A. 0
• B. 4
• C. 8
• D. -4

Answer: Option C

Explanation:

2 . ZA→B+4C

• A. $\frac{d\left|A\right|}{dt}=4\frac{d\left|C\right|}{dt}$
• B. $-\frac{d\left|A\right|}{dt}=4\frac{d\left|C\right|}{dt}$
• C. $-\frac{1}{2}\frac{d\left|A\right|}{dt}=\frac{1}{4}\frac{d\left|C\right|}{dt}$
• D. $-\frac{1}{2}\frac{d\left|A\right|}{dt}=4\frac{d\left|C\right|}{dt}$

Answer: Option C

Explanation:

3 . A→=i+2j+2k∧

• A. $\frac{3}{5}$
• B. $\frac{5}{3}$
• C. $\frac{2}{3}$
• D. $\frac{3}{2}$

Answer: Option B

Explanation:

4 . A⇀

• A. $\left|\stackrel{\rightharpoonup }{A}\right|=\left|\stackrel{\rightharpoonup }{B}\right|$
• B. $\stackrel{\rightharpoonup }{A}.\stackrel{\rightharpoonup }{B}=0$
• C. $\stackrel{\rightharpoonup }{A}\times \stackrel{\rightharpoonup }{B}=0$
• D. $\stackrel{\rightharpoonup }{A}=-2B$

Answer: Option A

Explanation:

5 . A→B

• A. $0.1mol{L}^{-1}{s}^{-1}$
• B. $0.01mol{L}^{-1}{s}^{-1}$
• C. $0.005mol{L}^{-1}{s}^{-1}$
• D. $0.001mol{L}^{-1}{s}^{-1}$

Answer: Option D

Explanation:

6 . A→PCI5B→Nan

• A. $C{H}_{3}OH \& C{H}_{3}CI$
• B. $C{H}_{3}OH \& C{H}_{3}C{H}_{2}CI$
• C. $C{H}_{3}C{H}_{2}OH \& C{H}_{3}CI$
• D. $C{H}_{3}C{H}_{2}OH \& C{H}_{3}C{H}_{2}CI$

Answer: Option D

Explanation:

7 . A→=2i^+2j^-k^

• A. $-1$
• B. $\frac{7}{4}$
• C. $0$
• D. $2$

Answer: Option A

Explanation:

8 . A→=iˆ+2jˆ+kˆ ভেক্টরটির B→=iˆ+jˆ ভেক্টর অভিমুখ অংশক কত ?

• A. 3/√2
• B. √(7/2)
• C. 6
• D.

Answer: Option A

Explanation:

9 . a→+b→=a→−b→

• A. $\overrightarrow{a}>\overrightarrow{b}$
• B. $\overrightarrow{a}=\overrightarrow{b}$
• C. $\overrightarrow{a}\perp \overrightarrow{b}$
• D. $\overrightarrow{a}\parallel \overrightarrow{b}$

Answer: Option C

Explanation:

10 . A→ ও B→

• A. $0°$
• B. $45°$
• C. $90°$
• D. $180°$

Answer: Option C

Explanation:

11 . A→

• A. A/2
• B. 2A
• C. $\sqrt{3}A/2$
• D. 3A/4

Answer: Option C

Explanation:

12 . A→=4i^+4j^+4k^

• A. $6\sqrt{2}$
• B. $4\sqrt{2}$
• C. $8\sqrt{2}$
• D. $2\sqrt{2}$

Answer: Option D

Explanation:

13 . A→ = 6i^ – 8j^, B→ = -8i^+ 3j^

• A. a = 7 , b = 5
• B. a = 5, b = 7
• C. a = 5 , b = 8
• D. a = 3 , b = 7

Answer: Option B

Explanation:

14 . A→=-i^+7j^+2k^

• A. $\frac{2}{3}$
• B. $cos\frac{\pi }{4}$
• C. $\frac{4}{5}$
• D. $\frac{-5}{3\sqrt{6}}$

Answer: Option D

Explanation:

15 . A→=i+2j+2k∧

• A. $\frac{3}{5}$
• B. $\frac{5}{3}$
• C. $\frac{2}{3}$
• D. $\frac{3}{2}$

Answer: Option B

Explanation:

16 . A→ =4i ^ + 3j^ 

• A. $3\hat{i} + 4\widehat{j }$
• B. $6\hat{i}$
• C. $7\widehat{k }$
• D. $4\hat{i} + 3\widehat{j }$

Answer: Option C

Explanation:

17 . A→×B→=B→×A→

• A. $\mathrm{\pi }$
• B. $\frac{\mathrm{\pi }}{3}$
• C. $\frac{\mathrm{\pi }}{4}$
• D. $\frac{\mathrm{\pi }}{2}$

Answer: Option A

Explanation: