Advertisements
Advertisements
Question
State the characteristics required in a material to be used as an effective fuse wire.
Advertisements
Solution
An effective fuse wire should have high resistivity and a low melting point, so that excess current heats and melts it quickly, breaking the circuit.
RELATED QUESTIONS
To which wire should the fuse be connected?
A fuse wire is made of an alloy of ______ and ______. If the current in a circuit exceeds the current rating of the fuse wire, it ______.
Why is the fuse wire fitted in a porcelain casing?
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.
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.
Identify the option that displays the correct wiring with correct colour code:
Name the material of fuse. State one characteristic of the material used for fuse.
State the purpose of using a fuse in a circuit.
Two fuse wires are rated 5 A and 20 A. Which of the two is longer ?
