NDA || SCIENCE || PHYSICS || SEMICONDUCTOR || QUIZ

Which of the following devices are used in a reverse bias configuration?

p-n junction diode(I), solar cell (II), LED(III), Zener diode(IV), photodiode(V)

A signal of frequency 5 MHz is used to modulate a carrier signal wave of frequency 1 GHz. Find the frequencies of sidebands in MHz

The population density of a small town in 350 km^-2 Finds the height of the transmitting antenna if a population of 4.4 lakh are to be provided with the service. (mean radius of earth = 6400 km)

A signal of a frequency of 5 × 10¹³ Hz is used in a communication system. It is used to accommodate 10000 TV channels each of which uses a bandwidth of 2.5 × 10⁸ Hz for transmission. Find the % of frequency bandwidth used of the original signal.

Determine the reading of the ammeter. (Assume all devices are ideal)