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| Q. |
The base of an electric iron is brightly polished mainly - |
| A. | to make it smooth and frictionless |
| B. | to make it rust-proof |
| C. | to reduce heat loss by radiation |
| D. | to make it more durable |
| Answer» C. to reduce heat loss by radiation | |
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Explanation: Polished surfaces are poor radiators of heat. So loss of heat on that account is reduced and the electric iron remains hotter than otherwise. |
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