Equal potentials are applied on an iron and copper wire of same length. In order to have the same current flow in the two wires, the ratio r (iron)/r(copper) of their radii must be (Given that specific resistance of iron `=1.0 xx 10^(-7) ohm-m` and specific resistance of copper `=1.7 xx 10^(-8) ohm-m`)

The specific resistance of manganin is 50 xx 10^(-8) ohm xx m . The resistance of a cube of length 50 cm will be

Two copper wires of length 1m and 9m have equal resistances. Then their diameters are in the ratio:

Find the resistance of a copper wire of length 1m and area of cross-section 2mm ^(2) .The specific resistance of copper= 1.7xx10^(-8)Ohm-m .

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.

Two copper wires, one of length 1 m and the other of length 9m have the same resistance. The diameter in the ratio

In house wiring, copper wire 2.05 mm in diameter is often used. Find the resistane of 35.0 m long wire. Specific resistance of copper is 1.72xx10^-8Omega-m .

In house wiring, copper wire 2.05 mm in diameter is often used. Find the resistane of 35.0 m long wire. Specific resistance of copper is 1.72xx10^-8Omega-m .

There are two wires of copper and iron of the same length but difference radii .When equal potential difference between the ends of each wire, the same current flows in them. What the ratio of their radii .Specific resistance of copper and irons are 1.6 xx 10^(-8) Omega m and 1.0 xx 10^(-7) Omega m respectively

When the resistance of copper wire is 0.1 Omega and the radius is 1mm, then the length of the wire is (specific resistance of copper is 3.14 xx 10^(-8) ohm xx m )

When the resistance of copper wire is 0.1 Omega and the radius is 1mm, then the length of the wire is (specific resistance of copper is 3.14 xx 10^(-8) ohm xx m )