00:01
Hello in the question it is given.
00:01
In xena regulated power supply, a zina diode with the voltage that is vz is equal to 6 volt and it is used for regulation and the load current is to be equal to 4 millie ampere.
00:18
So the load current is generally represented by il that is equal to 4 mill ampure and the unregulating point, is 10 volt that is unregulating point is equal to 10 volt so this is an point here and we need to calculate what should be the value of series resistance r so r value that we need to find out so in order to have a good load regulations the value of series resistance r should be such that the current through the xenadiod is much larger than the load current.
01:07
So, xenar current must be much much larger than load current.
01:13
So here, load current is 4 ampier.
01:15
So, xenar current must be much, much greater than 4mm.
01:19
So, for this, we select the xna current 5 times the load current.
01:25
So, iz is equal to 5 times load current, that is equal to 5 into 4.
01:31
So that is nothing but 20maliamper.
01:33
So this is the current of xenar current...