If a rod has resistance `4 Omega` and if rod is turned as half cycle then the resistance along diameter

If a rod has resistance 4 Omega and if rod is turned as half circle, then the resistance along diameter is

A wire has resistance 12 Omega . It is bent in the form of a circle. The effective resistance between two points across a diameter is.

A wire has resistance 12 Omega . It is bent in the form of a circle. The effective resistance between two points across a diameter is.

A cylindrical copper rod has length L and resistance R. If it is melted and formed into another rod of length 2L, the resistance will be

A circular coil of single turn has a resistance of 20 Omega Which one of the following is the correct value for the resistance between the ends of any diameter of the coil?

A 10 m long potentiometery wire has a resistance of 20 Omega it is connected to a battery of emf 6 V and internal resistance 4 Omega find the potential gradient along the wire.