<p>A wire of length 10 cm and diameter 0.5 mm is used in a bulb. The temperature of the wire is&nbsp;<span class="equation">\(1727^0C\)</span>&nbsp;and power radiated by the wire is 94.2 W . Its emissivity is&nbsp;<span class="equation">\(\frac{x}{8}\)</span>&nbsp;where x = _____</p>

<p>(Given&nbsp;<span class="equation">\(\sigma=6.0\times10^{-8}Wm^{-2}K^{-4}, \pi=3.14\)</span>&nbsp;and assume that the emissivity of wire material is same at all wavelength.)​​​​​​​</p>

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