In a Zener regulated power supply a Zener diode with is used for regulation. The load current is to be and the unregulated input is . What should be the value of series resistor
The current in the forward bias is known to be more than the current in the reverse bias What is the reason then to operate the photodiodes in reverse bias?
In figure , the supply can be varied from to . The Si transistor has and Assume that when the transistor is saturated, and Calculate the minimum base current, for which the transistor will reach saturation. Hence, determine , when the transistor is switched on.
In figure , the V to . The Si transistor has and Assume that when the transistor is saturated, and Find the ranges of for which the transistor is 'switched off and 'switched on'.