With neat circuit diadram describe the function of photodiode. How it is used to measure the light intensity ?

With neat circuit diagram describe the principal,construction and working of a potentiometer.

With neat circuit diagram describe the working of P—N junction diode and discuss about its forward characteristics.

with neat circuit diagram describe the construction and working of centretap full wave rectifier.

With neat circuit diagram describe the PNP transistor and what are their application.

With neat circuit diagram describe the principle, construction an dworking of meter bridge. Also determine the resistance of the wire.

(a)What is equation to describe the effect of temperature on rate of a reaction ? How can it be used to calculate the activation energy of a reaction ?