Physics 2nd Paper MCQ-Rajshahi Board-2021

1. When $s$ shunt is connected to a galvanometer of resistance $100 \Omega, 99 \%$ of the input current bypasses through the shunt. What is the resistance of shunt?

2. The energy gap between the valance band and conduction band of a good conductor is -

3. $1 \mathrm{~kW}-\mathbf{h r}=$ ? $\mathrm{J}$

4. A constructive interference is observed due to superposition of two coherent source of same frequency and amplitude, when -

i. the two wave superimpose in same phase

ii. their path difference is even multiple of $\frac{\lambda}{2}$

iii. their phase difference is integer multiple of $\pi$

Which one is correct?

5. The binary expression for the number 25 is -