Physics 2nd Paper MCQ-Barishal Board-2023

1. In the triangle $A B C$ of the figure $A B=A C$ $=2 B D=2 C D$ and $q_{B}=+2 c, q_{C}=+4 \mathrm{C}$ The potential of points $A$ and $D$ are $V_{A}$ and $V_{D}$ which one of the following is correct?

2. According to the tigure, the equipotential points are-

3. What is the coefficient of performance of a refrigerator working between the temperature $-8^{\circ} \mathrm{C}$ and $27^{\circ} \mathrm{C}$ ?

4. Which of the following graph is correct with increasing the distance between two plates (d) of a parallel plate capacitor?

5. If the potential difference of two points of an electric bulb decreases by $2 \%$. What percentage the power of the bulb will be decreased?