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प्रश्न
A fuse is rated 8A. Can it be used with an electrical appliance rated 5 KW, 200 V ? Give a reason.
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उत्तर
`P = 5 xx 10^3 W`
V = 200
`:. P = IV`
`5 xx 10^3 = I[200]`
`5000/200 = I`
I = 25 A
25 A > 8 A
Yes it can be used ∵ current is greater than 8A
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संबंधित प्रश्न
Explain the meaning of the student 'current rating of a fuse is 5A'.
What is a fuse?
A fuse is connected in ______ with the ______ 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 ?
Higher the current rating, _______ is the fuse wire.
Why fuse wire must always be connected in ‘live’ wire? Explain.
Where are the cartridge type fuse used?
What is the rating of fuse used in power circuits, in domestic use?
What is an ‘electric fuse’? State its two characteristics of electric fuse.
Why is it not advisable to use a piece of copper wire as fuse wire in an electric circuit?
