1801 . '-50 D' ক্ষমতা বিশিষ্ট কটি অবতল লেন্সের ফোকাস দূরত্ব কত ?

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

Answer: Option D

Explanation:

• A. $MLT$
• B. $ML{T}^{-1}$
• C. $M{L}^{-1}{T}^{-1}$
• D. $M{L}^{-1}{T}^{-2}$

Answer: Option B

Explanation:

• A. $10 m{s}^{-1}$
• B. $20 m{s}^{-1}$
• C. $40 m{s}^{-1}$
• D. $\mathrm{\pi } m{s}^{-1}$

Answer: Option B

Explanation:

• A. ভর $4kg$ ও বেগ $5m{s}^{-1}$
• B. ভর $2kg$ ও বেগ $6m{s}^{-1}$
• C. ভর $3kg$ ও বেগ $6m{s}^{-1}$
• D. ভর $5kg$ ও বেগ $4m{s}^{-1}$

Answer: Option C

Explanation:

• A. $R=\frac{f}{F}\times 100\%$
• B. $R=\frac{F}{f^2}$
• C. $R=\frac{F}{f}\times 100\%$
• D. $R=\frac{f^2}{F}$

Answer: Option A

Explanation:

• A. $1Bq=2.7\times {10}^{-11}{C}^{\mathcal{i}}$
• B. $1C\mathfrak{i}=3.7\times {10}^{-11}Bq$
• C. $1C\mathfrak{i}=3.7\times {10}^{-9}Bq$
• D. $1Bq=3.7\times {10}^{-11}C\mathfrak{i}$

Answer: Option A

Explanation:

• A. $1 :\sqrt{8}$
• B. $1 :\sqrt{2}$
• C. $1 : 8$
• D. $1 : 2$

Answer: Option A

Explanation:

• A. $R\infty A^{-\frac{1}{3}}$
• B. $R\infty A^{\frac{1}{3}}$
• C. $R\infty A^{\frac{1}{2}}$
• D. $R\infty A^{-\frac{1}{2}}$

Answer: Option B

Explanation:

• A. $T^2=R^3$
• B. $T^3\infty R$
• C. $T^3=R^2$
• D. $T^3\infty R^3$

Answer: Option A

Explanation:

• A. $3.7\times {10}^{7}Bq$
• B. $3.7\times {10}^{10}Bq$
• C. $3.7\times {10}^{-7}Bq$
• D. $3.7\times {10}^{-10}Bq$

Answer: Option B

Explanation:

• A. $\frac{volt}{amp/sec}$
• B. $\frac{volt-sec}{amp}$
• C. Henry
• D. সবগুলো

Answer: Option D

Explanation:

• A. $1 \dot{A}$
• B. $10 \dot{A}$
• C. $0.1 \dot{A}$
• D. $100 \dot{A}$

Answer: Option B

Explanation:

• A. $\frac{1}{2}{p}^{2}c$
• B. $\frac{1}{4}p{c}^2$
• C. $\frac{1}{3}p{c}^2$
• D. $\frac{1}{3}p{c}^3$

Answer: Option C

Explanation:

• A. $\frac{u^2}{r}$
• B. $\frac{u}{r^2}$
• C. $\frac{u}{r}$
• D. $\frac{r^2}{u}$

Answer: Option A

Explanation: