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

The self inductance of a solenoid that has a cross-sectional area of 1 cm^(2) , a length of 10 cm and 1000 turns of wire is

Three rods made of the same materail and having same cross-section area but diferent length 10 cm, 20 cm and 30 cm are joined as shown. The temperature of the junction is

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 wire of area of cross-section 10^(-6) m^(2) is increased in length by 0.1 %. The tension produced is 1000 N. The Young's modulus of wire is

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.

Two wires A and B of the same material and having same length, have their cross-sectional areas in the ratio 1:4 . what should be the ratio of heat produced in these wires when same voltage is applied across each ?