in the circuit shown, find maximum load current

 

If this is homework, it should go under the homework tab. Have you made any attempt at doing this yourself? Perhaps some background would help.

 

hi Hafiz,

You have shown a supply voltage of only 3.2 Volts, is this correct.?
E

 

What are the component values?
Where is the load?

 

in the circuit given the current is constant (3.2/(R1+RV1)) (until the battery runs down) and the zener diode will never turn on

 

sorry the qstn was wrong...

 

24V/RV1

 

but i am looking for a specific numeric answer

 

but i am looking for a specific numeric answer

You've been given enough information to calculate that.

 

t

You've been given enough information to calculate that.

the people who gave me the question at least think so..

 

but i am looking for a specific numeric answer

I'm going to Tennessee. I don't know how far it is but I will be traveling at 65 miles per hour. How long will I have to drive at that speed. I want a specific numeric answer.

 

I'm going to Tennessee. I don't know how far it is but I will be traveling at 65 miles per hour. How long will I have to drive at that speed. I want a specific numeric answer.

What was the number they came up with on The Hitch Hikers Guide to the Galaxy?

 

Forty-two.

 

42. (Sorry, I forgot we're not allowed to give answers to Homework questions ).

Edit: Pipped at the post by #12!

 

but i am looking for a specific numeric answer

then start putting in some numbers. You know you want 10mA through the zener so set the value of R1 with RV1 open circuit. Change value of RV1 and see how R1 must change to keep 10ma in the zener plus the current in RV1. Try a whole series of values for RV1, plot some graphs. Use Excel.

 

This forum is not here to do your homework for you. That's your job.

 

MOD NOTE: Moved from General Electronics Chat to Homework Help.

 

Hello,

Have a look at this page of our eBook:
http://www.allaboutcircuits.com/textbook/semiconductors/chpt-3/zener-diodes/

Bertus

 

t

the people who gave me the question at least think so..

It depends on what specifications you make regarding the design.

First, are you sure that the power rating on the zener is 600 W and not 600 mW?

A common design approach for a circuit like this (at least in an academic setting) is to design the circuit so that the zener is operating at it's maximum current allowable when the load is at one of its extreme limits. What would that mean for this circuit?

 

This forum is not here to do your homework for you. That's your job.

I could have swore someone already said that.