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एक बर्तन में लगे 220 वोल्ट तापक का प्रतिरोध 55 ओम है । यदि उत्पन्न ऊष्मा का `25%` व्यर्थ जाता है , तो 2 लीटर जल को जिसका `10^(@)C` ताप है `100^(@)C` त

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एक बर्तन में लगे 220 वोल्ट तापक का प्रतिरोध 55 ओम है । यदि उत्पन्न ऊष्मा का `25%` व्यर्थ जाता है , तो 2 लीटर जल को जिसका `10^(@)C` ताप है `100^(@)C` तक गर्म करने में कितना समय लगेगा ?
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Correct Answer - 19 मिनट 5.45 सेकण्ड ।
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