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 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 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

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

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

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 fuse made of lead wire has an area of cross-section 0.2mm^(2) . On short circuiting. The current in the fuse wire reaches 30A. How long after the short circulting will the fuse begin to melt? For lead, specific heat 0.032 "cal" g^(-1) .^(@)C^(-1) , melting point =327^(@)C , density = 11.34g cm^(-3) and the resistivity =22xx10^(-6)Omega cm. Initial temperature of the wire is 20^(@)C . Neglect heat losses.

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.

A fuse made of lead wire has an area for cross-section 0.2mm^(2) . On short circuiting will the fuse wire reaches 32 A. How long after the short circuiting will the fuse begin to melt? For lead, specific heat capacity 134J kg^(-1)K^(-1) , melting point = 327^(@)C , relative density =11.34, initial temperature = 20^(@)C electricaL resistivity =11xx10^(-8)Omegam .