Hi:

Please, I am looking for a math analysis about maximizing sensitiviness conditions in classical Wheatstone 4-resistance bridge. Can somebody advice me about link/book/article related ?
Thanks very much. My best regards.
Roberto

 

Hi:

Please, I am looking for a math analysis about maximizing sensitiviness conditions in classical Wheatstone 4-resistance bridge. Can somebody advice me about link/book/article related ?
Thanks very much. My best regards.
Roberto

The sensitivity of a Wheatstone bridge is directly proportional to the galvanometer used for the null detector. Actually, if this was a true voltmeter, drawing no current whatsoever, you'd have the most sensitive instrument possible.

Eric

 

Since this is homework what have you thought so far?

Take the equation of balance and write in terms of unknown = some function of knowns.

Now differentiate and set to zero to find max sensitivity condition.