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 1 of 4.
DebashisD said:
3 years ago
Fuse wire is a wire of high resistance and low melting point.
(3)
Iam genius said:
1 decade ago
If a fuse has high resistance than it will also interfere with the working impedance of the circuit.
Let me say we have circuit with some impedance and a high resistance fuse connected in series. Now if fault occurs then it would be limited by the high resistance of the fuse. So there is no need for the fuse to melt.
See all I want to say is how can you use a high resistance material to protect something from over current.
Let me say we have circuit with some impedance and a high resistance fuse connected in series. Now if fault occurs then it would be limited by the high resistance of the fuse. So there is no need for the fuse to melt.
See all I want to say is how can you use a high resistance material to protect something from over current.
Bibhudatta nayak said:
1 decade ago
Fuse high specific resistance and low melting point.
Rajesh said:
1 decade ago
Fuse (lead+tin) has high specific resistance than copper. But fuse resistance is lesser than load.
Aaishu said:
1 decade ago
Yes, lead is used in fuse because of low melting point & high resistance.
PROSENJIT HALDER said:
10 years ago
A fuse wire always should have high resistance and low melting point.
Samayara said:
9 years ago
I agree @Prosenjit Halder.
The high resistance is correct to tha concept of resistance and current.
The high resistance is correct to tha concept of resistance and current.
Subhra said:
9 years ago
The material should have low melting point and low resistance.
Low resistance because if there is low are then there will be large current and heat produced in fuse material is more dependent on current (I) than resistance.
Low resistance because if there is low are then there will be large current and heat produced in fuse material is more dependent on current (I) than resistance.
Subhra said:
9 years ago
Example. A 50 ohm resistance is connected accros a 100 volt supply, then heat will be is 200 joule in 1 sec. Now the resistance of 20 ohm is connected of same material accros the supply. Now heat will be 500 joule in 1 sec.
ABHI said:
9 years ago
Fuse is connected in series with load so we consider current passing though it.
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