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प्रश्न
Name the material of fuse. State one characteristic of the material used for fuse.
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उत्तर
An alloy of lead and tin is used as a material of fuse because it has low melting point and high resistivity. The use of fuse safeguards the circuit and appliances connected in that circuit from being damaged.
संबंधित प्रश्न
State the characteristics required in a material to be used as an effective fuse wire.
A fuse is rated 8A. Can it be used with an electrical appliance rated 5 KW, 200 V ? Give a reason.
Why is the fuse wire fitted in a porcelain casing?
‘A fuse is rated 8 A’. can it be used with an electrical appliance of rating 5kW, 200V?
(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 ?
Why fuse wire must always be connected in ‘live’ wire? Explain.
What is the rating of fuse used in power circuits, in domestic use?
Explain the significance of kWh meter, main switch and main fuse in house-circuiting.
How does the length of a fuse wire depend on its current rating?
Name two safety devices which are connected to the live wire of a household electric circuit.
