What is quarter and half wave plate?

What is modulated wave ?

What is the area of the plates of a parallel plate capacitor of capacity 2pF with separation between the plates 0.5 cm?

What is the area of the plates of 2 Farad parallel plate capacitor given that the separation between the plate is 0.5 cm (centimeter).

What is the area of the plates of a 2F parallel plate capacitor given that te separation between the plates is 0.5 cm ?

What is the area of the plates of a 3 F parallel plate capacitor, if the separation between the plates is 5 mm?

An ac input signal of frequency 60 Hz is rectified by a half wave full wave rectifier. Draw the output waveform and write the output frequency in each case.