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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
Explain the meaning of the student 'current rating of a fuse is 5A'.
A fuse is rated 8A. Can it be used with an electrical appliance rated 5 KW, 200 V ? Give a reason.
A fuse is a short piece of wire of high ______ and of material of low ______.
How is a fuse put in an electric circuit?
Two fuse wire of same length are rated 5 A and 20 A. Which of the two is thicker?
The rating of a fuse connected in the lighting circuit is ______.
Why fuse wire must always be connected in ‘live’ wire? Explain.
What is the rating of fuse used in light and fan circuits?
What is the rating of fuse used in power circuits, in domestic use?
'A fuse is rated 8 A'. Can it be used with an electrical appliance of rating 5 kW, 200 V?
