InterviewSolution
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InterviewSolution
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What is an electricfuse ? How does it function ? |
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Answer» SOLUTION :An electricfuseisan important component of all domesticcircuits . It is used to avoidincidentssuch as electricshock ,fire, DAMAGE toan electricappliancedue to (a) short - circuitingor (b) overloading(darwing a current beyonda specified limit) in a circuit . A fuseisa mostimportant safety device . Itconsists foshortthintin-placed copperwire havinglow melting point . It meltsandbreaks the circuitif thecurrentexceeds a safevalue . Important pointsregrarding a fuse : (1) A fusein always connected in seires with the live wire . (2) A fuse is alwaysconnectedin thebeginingof the circuit . (3) Thethicker the fusewire,the greateris itscurrent- carrying capacity(also called currentratting) less than the maximumcurrentwhicha circuit (or an appliance ) canwithstand .  Two different typesofelectric fuseused in a domesticcircuit are SHOWN above . Twodifferents TYPES of eletric fuse usedin adomesticcircuitare shown above . The useof an electricfusepreventsa possibledamgeto theelectriccircuit and the applianceby stoppingthe flow of undulyhigh electriccurrent . The joule heatingof the fusemeltsit. Thisbreaksthe electriccircuit . |
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