Advertisements
Advertisements
Question
Why is the fuse wire fitted in a porcelain casing?
Advertisements
Solution 1
The fuse wire is fitted in a porcelain casing because porcelain is an insulator of electricity.
Solution 2
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.
APPEARS IN
RELATED QUESTIONS
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 ______.
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?
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.
