Each of the resistances shown in figure has a value of 20 Ω. Find the equivalent resistance between A and B. Does it depend on whether the point A or B is at higher potential?



The given figure can also be made as:

which looks like a Wheatstone bridge. Hence, current through the middle arm = 0A


∴ Current through the diode = 0A.


Equivalent circuit diagram becomes:


Untitled.png


∴ Net resistance


• R =


• R = 20ohm


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