A thin wire has a length of 21.7 cm and radius of 0.46 mm. Calculate the volume of the wire correct to two decimal places.

A thin wire has a length of 21.7 cm and radius 0.46 mm. Calculate the volume of the wire to correct significant figures.

A thin wire has length of 21.7 cm and radius 0.46 mm. Calculate the volume of the wire to correct significant figures?

A copper wire of length 1 m and radius is joined in series with an iron wire of length 2 m and radius 3 mm and a current is passed through the wire. The ratio of the current density in the copper and iron wires is

A nicrome wire of length 100cm and radius 0.36 mm has a resistance of 1.5Omega . Calculate the resistivity of nicrome and also its conductivity.

A uniform wire of length 1 and radius r has resistance 100 Omega . it is recast into a thin wire of (i) length 2l (ii) radius r//2 . Calculate the resistance of new wire in each case.

A silver wire of length 2m and radius 1mm is joined in series with an iron wire of length "4m" and radius "3mm" and a current is passed through the wires. The ratio of the current density in the silver and iron wires is

If the measured value of the radius is 1.5% larger, the percentage error (correct to one decimal place) made in calculating the volume of a sphere is (a) 2.1 (b) 3.2 (c) 4.6 (d) 5.4

A wire of length 5m and radius 1mm has a resistance of 1 ohm . What length of the wire of the same material at the same temperature and of radius 2mm will also have a resistance of 1 ohm