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:
∴ Net resistance
• R =
• R = 20ohm