Why do we need filters in a power supply?

Where do we find fossils ?

Why do we see moonlight ?

Where do we find fossils?

State the priniciple of microscope. Why do we need electron microscope?

Take some water in a pot and add few pieces of ice to it . Observe what happens . Why do we see the ice float on water ?

A 5.0 V stabilized power supply is required to be designed using a 12V DC power supply as an input source. The maximum power rating P_z of the Zener diode is 2.0 W. Using the Zener regulator circuit, calculate The minimum value of the series resistor, R_s

A 5.0 V stabilized power supply is required to be designed using a 12V DC power supply as an input source. The maximum power rating P_z of the Zener diode is 2.0 W. Using the Zener regulator circuit, calculate: The Zener current Iz at full load.