A 2m long wire of resistance 4 ohm and diameter 0.64 mm is coated with plastic insulation of thickness 0.06 mm. When a current of 5 A flows through the wire
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According to stefan’s law of radiation a black body radiates energy σT^4 from is unit surface area every second where T is the surface temperature of the black body and σ=5.67×10^−8W/m^2K^4 is known as Stefan’s of as a ball of radius 0.5m When detonated it reaches temperature of 106K and can be treated as a black body Estimate the power it radiates .
02
Sep
According to stefan’s law of radiation a black body radiates energy σT^4 from is unit surface area every second where T is the surface temperature of the black body and σ=5.67×10^−8W/m^2K^4 is known as Stefan’s of as a ball of radius 0.5m When detonated it reaches temperature of 106K and can be treated as a [...]
Two bodies A and B have thermal emissivities of 0.01 and 0.81 respectively. The outer surface areas of the two bodies are same. The two bodies emit total radiant power at the same rate. The wavelength λB corresponding to maximum spectral radiancy from B is shifted from the wavelength corresponding to maximum spectral radiancy in the radiation from A by 1.0 μm. If the temperature of A is 5802 K, calculate
02
Sep
Two bodies A and B have thermal emissivities of 0.01 and 0.81 respectively. The outer surface areas of the two bodies are same. The two bodies emit total radiant power at the same rate. The wavelength λB corresponding to maximum spectral radiancy from B is shifted from the wavelength corresponding to maximum spectral radiancy in [...]
A 2m long wire of resistance 4 ohm and diameter 0.64 mm is coated with plastic insulation of thickness 0.06 mm. When a current of 5 A flows through the wire, find the temperature difference across the insulation in steady state.
02
Sep
A 2m long wire of resistance 4 ohm and diameter 0.64 mm is coated with plastic insulation of thickness 0.06 mm. When a current of 5 A flows through the wire, find the temperature difference across the insulation in steady state. A 2m long wire of resistance 4 ohm and diameter 0.64 mm is coated [...]