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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'.
State the characteristics required in a material to be used as an effective fuse wire.
A fuse is a short piece of wire of high ______ and of material of low ______.
Describe with the aid of a diagram some form of a fuse which is used in the electric lighting circuit of a house. Give two reasons why a fuse must not be replaced by an ordinary copper wire.
Two fuse wire of same length are rated 5 A and 20 A. Which of the two is thicker?
An electric kettle is rated 3 kW, 250 V. Give reason whether this kettle can be used in a circuit which contains a fuse of current rating 13 A.
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 the material of fuse. State one characteristic of the material used for fuse.
How does the length of a fuse wire depend on its current rating?
