Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
The figure above shows the most common fuse arrangement in which the fuse wire is stretched between the two metallic terminals T1 and T2 in a porcelain holder. This holder fits into a porcelain socket having two metallic terminals, to each of which the live wire of the circuit is connected. A fuse must not be replaced with a copper wire because copper has very low resistivity and a high melting point.
Ordinary wire has low resistance and high M.P. and when High current passes into the appliance and gets damaged even then fuse will not melt and will not disconnect the appliance.
APPEARS IN
संबंधित प्रश्न
To which wire should the fuse be connected?
State the characteristics required in a material to be used as an effective fuse wire.
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 connected in ______ with the ______ wire.
Explain the meaning of the statement ‘the current rating of a fuse is 5 A’.
The rating of a fuse connected in the lighting circuit is ______.
Why fuse wire must always be connected in ‘live’ wire? Explain.
What is the rating of fuse used in power circuits, in domestic use?
(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.
