Physics 2nd Paper MCQ-Jessore Board-2023

1. The condition of bright in diffraction grating is-

i. $d \sin \theta_{n}=n \lambda$

ii. $d \sin \theta_{n}=(2 n+1) \frac{\lambda}{2}$

iii. $(a+b) \sin \theta_{n}=n \lambda$

Which one is correct?

2. What will be the electric current flow through a bulb $220 \mathrm{~V}-44 \mathrm{~W}$ ?

3. In the figure, a uniform electric field is $\vec{E}=$ $(2 \hat{i}+5 \hat{j}+6 \hat{k}) N C^{-1}$.

What is the electric flux on the $\mathrm{ZX}$ plane having area $40 \mathrm{~m}^{2}$ ?

4. Which of the following figure is n-p-n transistor?

5. Which element of the periodic table is used to produce n-type semiconductor?