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Jamatia Revolt
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1, 2 and 4 only
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Subhash Chandra Bose
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high resistance and low melting point
<ul> <li><b>Correct answer: D</b> โ A fuse wire should heat up and melt when overcurrent occurs.</li> <li>Key concept: Power dissipated as heat is P = I^2R. A fuse needs high resistance to generate more heat, and a low melting point so it melts quickly.</li> <li><b>Why D is correct:</b> High resistive material converts more electrical energy into heat; low melting point allows rapid melting.</li> <li><b>Incorrect options:</b> A would not melt easily due to high melting point; B and C have too low heat generation or too high melting point for reliable fusing.</li> <li><b>Exam tip:</b> Remember: fuse = high resistance + low melting point for quick protection.</li> </ul>