Question

please tell this question
by best explanation​

Answer 1

Answer:

As the wire section cd do not have any resistance, thus net effective resistance across cd is zero.

Equivalent resistance across cd is zero.

Equivalent resistance across e and f, Ref=R/2 ∥ R

∴ Ref = R×R/2/R+R/2=R/3

Net effective resistance of the circuit R′=R/2+R eff+R/2