The resistance between ends will be

A cylindrical copper rod is reformed to twice its original length with no change in volume. The resistance between its ends before the change was R. Now its resistance will be :

A letter 'A' is constructed of a uniform wire with resistance 1.0Omega per cm. The sides of the letters are 20 cm and the cross piece in the middle is 10cm long. The apex angle is 60^(@) . The resistance between the ends of the legs is close to :

Three resistances, each of 5 Omega , are connected to form a triangle. Calculat the resistance between two ends of any arm.

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 material of resistivity rho is formed in the shape of a truncated cone of altitude h as shown in the figure. The top end has radius a while bottom b . Assuming a uniform current density through any circular cross-section of the cone, the resistance between two ends is : .