Two wires made of tinned copper having identical cross section `( = 10^(-6) m^(2))` and lengths `10 and 15 cm` are to be used as fuses. Show that the fuses will melt at the same value of current in each case.

Two wires made of tinned copper having identical cross-section (=10^(-6)m^(2)) and lengths 10cm and 15cm are to be used as fuses. Sow that the fuses will melt at the same value of current in each case.

Two wires made of a good conductor, having same area of cross-section and different lengths, are to be used as fuses. Show that the fuses will melt at the same value of current in each case

A wire of length 1m and area of cross section 4 xx 10^(-8) m^(2) increases in length by 0.2 cm when a force of 16 N is applied. Value of Y for the material of the wire will be

A negligible small current is pass through a wire of length 15m and uniform cross section 6xx10^(-7)m^(2) and its resistance is measured to be 5Omega . What is the resistivity of the material at the temperature of the experiment ?

Two wires one of copper and other of iron having same cross-section area and lengths 2 m and 1.5 m respectively are fastened end and stretched by a load 10 N. If copper wire is stretched by 2mm then find the total extension of combined wire, Y_(Cu)=1xx10^(11)N//m^(2) and Y_(Fe)=3xx10^(11)N//m^(2) .

Two wires one of copper and other of iron having same cross-section area and lengths 2 m and 1.5 m respectively are fastened end and stretched by a load 10 N. If copper wire is stretched by 2mm then find the total extension of combined wire, Y_(Cu)=1xx10^(11)N//m^(2) and Y_(Fe)=3xx10^(11)N//m^(2) .

A copper wire of length 2m and area of cross-section 1.7 xx 10^(-6)m^(2) has a resistance of 2 xx 10^(-2) ohms. Calculate the resistivity of copper.

A current of 4.8 A is flowing in a copper wire of cross-sectional area 3xx10^(-4) m^(2) . Find the current density in the wire.