Physics 2nd Paper MCQ-Chittagong Board-2023

1. In a single slit (width=a) diffraction fringe is created by the light of wavelength $\lambda$, where the diffraction angle is $\theta$. The condition of constructing 1 st minima point is-

2. S.I unit of electric intensity-

3. Dimension of Planck's constant is similar to-

4. In the above circuit (Fig-1) power spent by $9 \Omega$ resistance is $36 \mathrm{~W}$. What is the potential difference at two ends of the $2 Q$ resistance?

5. Properties of line of forces are-

i. open curve line

ii. producing from negative charge end at the positive charge

iii. apply a pressure from sideways

Which one is correct?