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प्रश्न
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उत्तर
An electric fuse is a device which is used to limit the current in an electric circuit. The use of a fuse thus safeguards the circuit and appliances connected in that circuit from being damaged. It is a short piece of wire made of an alloy of lead and tin. If the current passing through the fuse exceeds the safeguard limit the heat produced melts the fuse and this breaks the circuit.
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संबंधित प्रश्न
Explain the meaning of the student 'current rating of a fuse is 5A'.
For a fuse, higher the current rating ________ is the fuse wire.
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 ______.
Why is the fuse wire fitted in a porcelain casing?
Two fuse wire of same length are rated 5 A and 20 A. Which of the two is thicker?
(i) Write one advantage of connecting electrical appliances in parallel combination.
(ii) What characteristics should a fuse wire have ?
(iii) Which wire in a power circuit is connected to the metallic body of the appliance ?
What is the rating of fuse used in power circuits, in domestic use?
What is an ‘electric fuse’? State its two characteristics of electric fuse.
How does the length of a fuse wire depend on its current rating?
