Question Bank of Physics

$19.,$Explain the working principle of a PN junction diode in detail, including the formation of the depletion region and the flow of charge carriers during both forward and reverse bias conditions$],$

$[20.,$Discuss the effect of temperature in intrinsic semiconductor with the help of energy band diagram.$],$

$[21.,$Distinguish between Type I and Type II superconductors with examples.$],$

$[22.,$Compare Conductors, Insulators & Semiconductors with the help of their Energy band diagrams.$],$

$[23.,$Compare the effect of temperature on a pure semiconductor and a doped semiconductor.$],$

$[24.,$What is the difference between a silicon diode and a germanium diode? Draw and Explain the I$-$V characteristics of a PN junction diode.$],$

$[25.,$What is Doppler effect in sound? Derive the expression for change in frequency $($i$)$when source is moving and observer is stationary $($ii$)$ when observer is moving and source is stationary$],$

$[26.,$Define Timber, Pitch, Loudness, Intensity Level$],$

$[27.,$What are the different methods of generating ultrasonic waves? How do ultrasonic waves assist in measuring the distance or depth.$],$

$[28.,$Write short note on Biomaterials.$],$

$[29.,$Compare Nano materials and Biomaterials.$],$

$[30.,$Explain the principle of X$-$ray imaging in medical diagnostics.$]]$