A wire of length 1 m and radius 1 mm is welded to another wire of length 2 m and radius 2 mm the free end of the first is clamped and aload of 5kg ispplied at the free end of the second wire . What is the total increase of the compound wire ? (Y of both wires `=2xx10^(11) ""Nm^(-2)`)

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 wire of length 2 ,m and radius 2 mm is stretched by 2.5 mm when a load of 5 kg is suspended from it Another wire of the same material put of length 1 m and radius 1 mm is attached below the load and a load of 3kg is suspended from this wire what is the total increase in length and what are the individual exensions of the wirs ?

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

A wire of length 5m is twisted through 30^(0) at free end If the radius of wire is 1mm , the shearing strain in the wire is

A wire of length 5m is twisted through 30^(0) at free end If the radius of wire is 1mm , the shearing strain in the wire is

One end of a steel wire of radius .r. is fixed to a ceiling and a load of 3 kg is attached to the free end of the wire. Another wire made of copper of radius .2r. is attached to the bottom of 3 kg load and a 2 kg load is attached to the free end of the copper wire. The ratio of longitudinal strains produced in copper and steel wires is (Young modulus of steel =20xx10^(10)Nm^(-2) ) (Young modulus of copper =12xx10^(10)Nm^(-2) )