149470 A spherical black body with a radius of $12 \mathrm{~cm}$ radiates $450 \mathrm{~W}$ power at $500 \mathrm{~K}$. If the radius were halved and the temperature doubled, the power radiated in watt would be

149471 A black body at $1227^{\circ} \mathrm{C}$ emits radiation with maximum intensity at a wavelength of $5000 \AA$. The temperature of the body is increased by $1000^{\circ} \mathrm{C}$. The maximum intensity will be observe at

149473 Two large closely spaced concentric spheres (both are black body radiators) are maintained at temperature of $200 \mathrm{~K}$ and $300 \mathrm{~K}$ respectively. The space between them is evacuated. The net rate of energy transfer between the two spheres will be $\left(\sigma=5.672 \times 10^{-8} \mathrm{MKS}\right.$ unit)

149474 A thin square steel plate with each side equal to $10 \mathrm{~cm}$ is heated by a blacksmith. The rate of radiated energy by the heated plate is $1134 \mathrm{~W}$. The temperature of the hot steel plate is (Stefan's constant $\sigma=5.67 \times 10^{-8} \mathrm{~W} \quad \mathrm{~m}^{-2} \mathrm{~K}^{-4}$, emissivity of the plate $=1$ )

149470 A spherical black body with a radius of $12 \mathrm{~cm}$ radiates $450 \mathrm{~W}$ power at $500 \mathrm{~K}$. If the radius were halved and the temperature doubled, the power radiated in watt would be

149471 A black body at $1227^{\circ} \mathrm{C}$ emits radiation with maximum intensity at a wavelength of $5000 \AA$. The temperature of the body is increased by $1000^{\circ} \mathrm{C}$. The maximum intensity will be observe at

149473 Two large closely spaced concentric spheres (both are black body radiators) are maintained at temperature of $200 \mathrm{~K}$ and $300 \mathrm{~K}$ respectively. The space between them is evacuated. The net rate of energy transfer between the two spheres will be $\left(\sigma=5.672 \times 10^{-8} \mathrm{MKS}\right.$ unit)

149474 A thin square steel plate with each side equal to $10 \mathrm{~cm}$ is heated by a blacksmith. The rate of radiated energy by the heated plate is $1134 \mathrm{~W}$. The temperature of the hot steel plate is (Stefan's constant $\sigma=5.67 \times 10^{-8} \mathrm{~W} \quad \mathrm{~m}^{-2} \mathrm{~K}^{-4}$, emissivity of the plate $=1$ )

149470 A spherical black body with a radius of $12 \mathrm{~cm}$ radiates $450 \mathrm{~W}$ power at $500 \mathrm{~K}$. If the radius were halved and the temperature doubled, the power radiated in watt would be

149471 A black body at $1227^{\circ} \mathrm{C}$ emits radiation with maximum intensity at a wavelength of $5000 \AA$. The temperature of the body is increased by $1000^{\circ} \mathrm{C}$. The maximum intensity will be observe at

149473 Two large closely spaced concentric spheres (both are black body radiators) are maintained at temperature of $200 \mathrm{~K}$ and $300 \mathrm{~K}$ respectively. The space between them is evacuated. The net rate of energy transfer between the two spheres will be $\left(\sigma=5.672 \times 10^{-8} \mathrm{MKS}\right.$ unit)

149474 A thin square steel plate with each side equal to $10 \mathrm{~cm}$ is heated by a blacksmith. The rate of radiated energy by the heated plate is $1134 \mathrm{~W}$. The temperature of the hot steel plate is (Stefan's constant $\sigma=5.67 \times 10^{-8} \mathrm{~W} \quad \mathrm{~m}^{-2} \mathrm{~K}^{-4}$, emissivity of the plate $=1$ )

149470 A spherical black body with a radius of $12 \mathrm{~cm}$ radiates $450 \mathrm{~W}$ power at $500 \mathrm{~K}$. If the radius were halved and the temperature doubled, the power radiated in watt would be

149471 A black body at $1227^{\circ} \mathrm{C}$ emits radiation with maximum intensity at a wavelength of $5000 \AA$. The temperature of the body is increased by $1000^{\circ} \mathrm{C}$. The maximum intensity will be observe at

149473 Two large closely spaced concentric spheres (both are black body radiators) are maintained at temperature of $200 \mathrm{~K}$ and $300 \mathrm{~K}$ respectively. The space between them is evacuated. The net rate of energy transfer between the two spheres will be $\left(\sigma=5.672 \times 10^{-8} \mathrm{MKS}\right.$ unit)

149474 A thin square steel plate with each side equal to $10 \mathrm{~cm}$ is heated by a blacksmith. The rate of radiated energy by the heated plate is $1134 \mathrm{~W}$. The temperature of the hot steel plate is (Stefan's constant $\sigma=5.67 \times 10^{-8} \mathrm{~W} \quad \mathrm{~m}^{-2} \mathrm{~K}^{-4}$, emissivity of the plate $=1$ )