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प्रश्न
Why is the fuse wire fitted in a porcelain casing?
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उत्तर १
The fuse wire is fitted in a porcelain casing because porcelain is an insulator of electricity.
उत्तर २
Because it is a very safe and convenient device. The fuse wire is stretched between two terminals in a porcelain holder. This porcelain holder is tightly fit into a porcelain socket which is connected in the live wire in the circuit. Porcelain is a very good insulator and the part of the holder we touch, is far from the live wire and so there are no dangers of getting any electric shock.
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संबंधित प्रश्न
State the characteristics required in a material to be used as an effective fuse wire.
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.
(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 light and fan circuits?
Explain the significance of kWh meter, main switch and main fuse in house-circuiting.
(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.
Identify the option that displays the correct wiring with correct colour code:
State the purpose of using a fuse in a circuit.
