Manipal Entrance Test 2019 Physics Paper

R1 and R2 are in parallel order, so their equivalent resistance R′=

2×2

2+2

=1Ω
Similarly, equivalent resistance of R3 and R4
R"=1Ω
R' and R" are in series order, so their equivalent resistance
R"′=R′+R" = 1 + 1 = 2Ω
R"' and R5 are in parallel.
So, RAB=

2×2

2+2

=1Ω