An electric heater of power 1 kW emits thermal radiations. The surface area of the heating element of the heater is 200 cm2. If this heating element is treated like a black body, find the temperature at its surface. Assume its temperature is very much higher than its surroundings.[σ=5.67×10−8 W m−2K−4]

An electric heater of power 1 kW emits thermal radiations. The surface

1.	An electric heater of power 1 kW emits thermal radiations. The surface area of the heating element of the heater is 200 cm2. If this heating element is treated like a black body, find the temperature at its surface. Assume its temperature is very much higher than its surroundings.[σ=5.67×10−8 W m−2K−4]
Answer» An electric heater of power $1 kW$ emits thermal radiations. The surface area of the heating element of the heater is $200 {cm}^{2}$ . If this heating element is treated like a black body, find the temperature at its surface. Assume its temperature is very much higher than its surroundings. [ $σ = 5.67 \times 10^{- 8} {W m}^{- 2} K^{- 4}$ ]

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