For the effective radiation of heat by an electric room heater, which of the following needs to be done?

Make it unshiny.

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Polish it to shine.

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Paint it green

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Paint it black

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Solution

The correct option is B
Polish it to shine.

Polished surfaces are good radiators of heat. A black body absorbs most of the heat while a lustrous object can radiate the maximum heat.

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For the effective radiation of heat by an electric room heater, which of the following needs to be done?

The correct option is B Polish it to shine. Polished surfaces are good radiators of heat. A black body absorbs most of the heat while a lustrous object can radiate the maximum heat.

The correct option is B
Polish it to shine.

Polished surfaces are good radiators of heat. A black body absorbs most of the heat while a lustrous object can radiate the maximum heat.