It is required to design a zener shunt regulator to provide a regulated voltage of about 10 v. the available 10-v, 1-w zener of type 1n4740 is specified to have a 10-v drop at a test current of 25 ma. at this current, its r z is 7 . the raw supply, v s , available has a nominal value of 20 v but can vary by as much as ±25%. the regulator is required to supply a load current of 0 ma to 20 ma. design for a minimum zener current of 5 ma.

Isobars are lines of constant or equal pressure on a weather map. they can be used to find areas of low or high pressure over a broad area, and they can tell us how intense the system may be. on weather maps, you may have noticed areas that have a large l or h over a region with lines circling around them. the l stands for low pressure and h stands for high pressure. the lines circling them are isobars. check out the pressure system and isobars over georgia and florida. what is the present weather in this area ? a) clear and sunny b) cold and cloudy c) changing weather d) lots of precipitation