Find the resistance of a copper cable of length 8 km, diameter 3mm, if its specific resistance is `1.7 xx 10^-8` ohm-metre.

Determine the resistance of a copper wire having a length of 1 km and diameter of 0.5 mm

Determine the resistance of a copper wire having a length of 1 km and diameter of 0,5 mm. (Given: rho=Resistivity of copper =1.7 times 10^(-8) Omega m )

Determine the resistance of a copper wire having, a length of 0.1 km and diameter of 0.5 mm. [Given: Resistivity of copper = 1.7 times 10^(-8) Omega m ]

The resistance of a wire of length 31.4 m and diameter 1 mm is 20 Omega . Find the resistivity of the material of the wire.

Equal lengths of magnin (p_1) and nichrome (p_2) are joined in the left hand and right hand gaps of meter-bridge.The null point is 40 cm from the left end. Compare the diameters of the wire. The specific resistances are p_1 = 4.8 xx 10^-8 Omega m, p_2=10^-6 Omega m .

Find the radius of the wire of length 25 m needed to prepare a coil of resistance 25 Omega . The resistivity of the material of the wire is 3.14 xx10^-7 Ω−m .

A piece of platinum wire has resistance of 2.5 Omega 0^@C . If its temperature coefficient of resistance is 4 xx 10^-3//^@C . Find the resistance of the wire at 80^@C .

Two resistances 2 ohm and 3 ohm are connected across the two gaps of the metre bridge as shown in the figure .Calculate the current through the cell when the bridge is balanced and the specific resistance of the material of the metre bridge wire. Given the resistance of the bridge wire is 1.49 ohm and its diameter is 0.12 cm.

The resistance of a wire of length 15.7 m and radius 0.5 mm is 10 Omega . Find the resistivity of the material of the wire.