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प्रश्न
What is an ‘electric fuse’? State its two characteristics of electric fuse.
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उत्तर
The electric fuse is a safety device in electric circuits, used to limit the current and thus it acts as a safeguard for the household circuit and any electric appliance connected in the circuit from being damaged. Its characteristics are:
(i) It has a low melting point (m.p.) of about 200°C and is usually made from an alloy of 50% tin and 50% lead.
(ii) It has a high resistance so that its temperature rises rapidly and soon exceeds its m.p. and thus breaks it, when current passing through it exceeds the permissible limits. In such a case it acts as a switch.
संबंधित प्रश्न
Name the factors on which the heat produced in a wire depends when current is passed in it, and state how does it depend on the factors stated by you.
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A fuse is connected in ______ with the ______ wire.
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Explain the meaning of the statement ‘the current rating of a fuse is 5 A’.
‘A fuse is rated 8 A’. can it be used with an electrical appliance of rating 5kW, 200V?
Why fuse wire must always be connected in ‘live’ wire? Explain.
What is the rating of fuse used in light and fan circuits?
Why is it not advisable to use a piece of copper wire as fuse wire in an electric circuit?
