General Knowledge - Basic General Knowledge - Discussion
Discussion Forum : Basic General Knowledge - Section 1 (Q.No. 49)
49.
For safety, the fuse wire used in the mains for household supply of electricity must be made of metal having
Discussion:
34 comments Page 4 of 4.
Sk Jahedul islam said:
8 years ago
As fuse wire alawys connect series with load.
It's a protective device.
H=I2RT.
From this equation, if we increase the value of heat by increasing ckt current or resistance.
If it's low resistance, that means we going to allow high current and it's damage our device.
So better if it's high resistance then the value of H increase and it's melt and protects the device.
Fuse material should low melting point , high resistance and high specific resistance(as length and cross-section of fuse material constant)
It's a protective device.
H=I2RT.
From this equation, if we increase the value of heat by increasing ckt current or resistance.
If it's low resistance, that means we going to allow high current and it's damage our device.
So better if it's high resistance then the value of H increase and it's melt and protects the device.
Fuse material should low melting point , high resistance and high specific resistance(as length and cross-section of fuse material constant)
Vigesh said:
7 years ago
The melting point of the fuse material should be low because the material should act faster to ihe increase in temperature so as to break the circuit (open circuit).
Ketan said:
7 years ago
What is short circuit? Please explain briefly in technical.
DebashisD said:
3 years ago
Fuse wire is a wire of high resistance and low melting point.
(3)
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