What is the equivalent resistance across A and B in the figure if R = 3Ω?
9Ω
12Ω
15Ω
none of the above
What is the equivalent resistance across A and B?
Two resistances R1 and R2 give an equivalent resistance of 4.5 Ω when connected in series and 1 Ω when connected in parallel. Then the value of resistances are___________.
Four wires each of same length diameter and material are connected to each other to form a square. If the resistance of each wire is R, then the equivalent resistance across the opposite corners is: