GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Metal used to make wires for safety fuses must have
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low resistivity and low melting point
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high resistivity and high melting point
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high resistivity and low melting point
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very low resistivity and high melting point
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Explanation:
Detailed explanation-1: -A lead and tin alloy with a low melting point is used to make fuse wire.
Detailed explanation-2: -The commonly used wire in the fuse is an alloy of tin and lead.
Detailed explanation-3: -A fuse wire should have high resistance and low melting point. So that it prevents current higher than the prescribed value to pass . Low melting point will let it to break when high current passes through it because of the heat generated.
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