A wire of length 1 m and radius `10^-3`m is carrying a heavy current and is assumed to radiate as a black body. At equilibrium, its temperature is 900 K while that of surrounding is 300 K. The resistivity of the material of the wire at 300 K is `pi^@xx10^-8` ohm m and its temperature coefficient of resistance is `7.8xx10^(-3)//C` (stefan's constant`sigma=5.68xx10^-8W//m^(2) K^(2)`.
The current in the wire is nearly

A wire of length 1 m and radius 10^-3 m is carrying a heavy current and is assumed to radiate as a black body. At equilibrium, its temperature is 900 K while that of surrounding is 300 K. The resistivity of the material of the wire at 300 K is pi^@xx10^-8 ohm m and its temperature coefficient of resistance is 7.8xx10^(-3)//C (stefan's constant sigma=5.68xx10^-8W//m^(2) K^(2) . Heat radiated per second by the wire is nearly

A wire of length 1 m and radius 10^-3 m is carrying a heavy current and is assumed to radiate as a black body. At equilibrium, its temperature is 900 K while that of surrounding is 300 K. The resistivity of the material of the wire at 300 K is pi^@xx10^-8 ohm m and its temperature coefficient of resistance is 7.8xx10^(-3)//C (stefan's constant sigma=5.68xx10^-8W//m^(2) K^(2) . Heat radiated per second by the wire is nearly

A wire of length 1 m and radius 10^-3 m is carrying a heavy current and is assumed to radiate as a black body. At equilibrium, its temperature is 900 K while that of surrounding is 300 K. The resistivity of the material of the wire at 300 K is pi^@xx10^-8 ohm m and its temperature coefficient of resistance is 7.8xx10^(-3)//C (stefan's constant sigma=5.68xx10^-8W//m^(2) K^(4) ). Q. The resistivity of wire at 900 K is nearly

A wire of length 1 m and radius 10^-3 m is carrying a heavy current and is assumed to radiate as a black body. At equilibrium, its temperature is 900 K while that of surrounding is 300 K. The resistivity of the material of the wire at 300 K is pi^@xx10^-8 ohm m and its temperature coefficient of resistance is 7.8xx10^(-3)//C (stefan's constant sigma=5.68xx10^-8W//m^(2) K^(4) ). Q. The resistivity of wire at 900 K is nearly

A wire of length 1 m and radius 10^(-3) m is carrying a heavy current and is assumed to radiate as a black body. At equilibrium its temperature is 900 K while that of the surroundings is 300 K. The resistivity of the material of the wire at 300 K is pi^2xx10^(-8)Omega-m and its temperature coefficient of resistance is 7.8xx10^(-3)per@_C (Stefan's constant =5.68xx10^(-8)W-m^2-K^4) . So, the current in the wire is

The resistance of a wire of 0.01 cm radius is 10 Omega . If the resistivity of the material of the wire is 50 xx 10^(-8) ohm meter, find the length of the wire.

What is the length of a wire of radius 0.2 mm and resitance 25 Omega ? The restivity of the material of the wire is 2pi xx 10^(-8) Omega.m.

A wire has radius 0.5 mm and length 62.8 m. If the resistivity of the material of the wire is 5 times 10^(-7) Omega -m , find the resistance of the wire.