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प्रश्न
(a) Name the electrical appliance shown in the diagram below.
(b) Name the material of the wire used in this device.
(c) Name two important characteristics of this wire.
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उत्तर
- The electrical appliance shown in the diagram is called 'Fuse'.
- The material used in 'Fuse' wire is made up of an alloy of lead (Pb) and tin (Sn) having a low melting point of 250°C.
- Characteristics of Fuse wire:
- It has high resistivity.
- It has a low melting point.
- It prevents electrical appliances from being damaged by a surge of high voltage current.
- It is made up of alloys of lead (Pb) and tin (Sn).
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संबंधित प्रश्न
Explain the meaning of the student 'current rating of a fuse is 5A'.
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.
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?
Explain the meaning of the statement ‘the current rating of a fuse is 5 A’.
(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 ?
How does the thickness of a fuse wire depend on its current rating?
What is the rating of fuse used in light and fan circuits?
Name two safety devices which are connected to the live wire of a household electric circuit.
