• A. অ্যাম্পিয়ারের সূত্র
• B. লরেঞ্জের সূত্র
• C. লেঞ্জের সূত্র
• D. ফ্যারাডের সূত্র

Answer: Option C

Explanation:

• A. 0.02m
• B. 0.20m
• C. 0.25m
• D. -0.02m
• E. 0.25m

Answer: Option D

Explanation:

• A. $5\hat{i} + 7\hat{j} + 9\hat{k}$
• B. $6\hat{i} + 12\hat{j} + 25\hat{k}$
• C. $\hat{i} + \hat{j}$
• D. $\hat{i} + \hat{j} + \hat{k}$

Answer: Option C

Explanation:

• A. $M$
• B. $\sqrt{m}$
• C. $R^{3/2}$
• D. $R^2$

Answer: Option C

Explanation:

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

Answer: Option D

Explanation:

• A. $\frac{q^4}{4\pi {\epsilon }_0{r}^2}$
• B. $\frac{q^5}{4\pi {\epsilon }_0{r}^2}$
• D. $\frac{5q}{4\pi {\epsilon }_0{r}^2}$

Answer: Option C

Explanation:

• A. 3d
• B. 9d
• C. $\frac{d}{3}$
• D. $\frac{d}{9}$

Answer: Option C

Explanation:

• A.
• B.
• C.
• D.

Answer: Option B

Explanation:

• A. $\frac{\sqrt{15}}{4}c$
• B. $\frac{3}{4}c$
• C. $\frac{9}{16}c$
• D. $\frac{15}{16}c$

Answer: Option A

Explanation:

• A. -1
• B. 1
• C. $\frac{-1}{\sqrt{2}}$
• D. $\frac{-2}{\sqrt{2}}$

Answer: Option D

Explanation:

• A. $E=\frac{1}{2}k{a}^2$
• B. $E=\frac{1}{2}m{\varpi }^2{a}^2$
• C. A ও B উভয়ই
• D. কোনোটিই নয়

Answer: Option C

Explanation:

• A. $\left[M{L}^{-2}{T}^{-1}\right]$
• B. $\left[ML{T}^{-2}\right]$
• C. $\left[M{L}^{-1}{T}^{-2}\right]$
• D. কোনোটিই নয়

Answer: Option C

Explanation:

• A. $\underset{F}{\to }=q\left(\underset{v}{\to }\times \underset{B}{\to }\right)$
• B. $\underset{F}{\to }=q\underset{E}{\to }$
• C. $\underset{F}{\to }=q\left(\underset{E}{\to }+\underset{v}{\to }\times \underset{B}{\to }\right)$
• D. কোনোটিই নয়

Answer: Option B

Explanation:

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

Answer: Option C

Explanation:

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

Answer: Option B

Explanation: