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What is the principal of gas welding operation?
The principle of gas welding is to heat two pieces of metal to their melting point or very close to it using a gas flame, then perform an action that causes them to fuse together. This action is typically the addition of more metal, but some metals can be welded together by heating them to the point where they become plastic, then laying one atop the other and beating the heck out of them with a hammer until they fuse into one piece.
A fuse in a circuit is meant to burn out first if there is a short circuit. Should a fuse have a higher or lower resistance than the wire in the rest of the circuit?
The way current (series) fuses are designed and used, they are meant to overheat and blow and cause an open circuit if the current flow through these goes above the rated value. The resistance value typically is slightly higher than the wiring and adds marginal value of series resistance to the overall circuitry. The material characteristics of fuse ensure that at regular nominal current flow the fuse does not overheat, but when larger than expected current flows it overheats, melts (or gives very high resistance/open in a resettable fuse)and causes circuit to open.
How do you measure the resistance of a 30-amp cartridge fuse in ohms?
Set a Volt-Ohm meter to Ohms and put the two leads from meter across the fuse. One on each end where the metal is located. The meter should read zero ohms if the fuse is NOT blown.
Why the high resistance earth fault in the appliance increase the risk of electric shock when using appliance in earth situation?
If the earth connection has a high resistance it is not capable of acting as a true earth. For example, the high resistance might mean that the fuse or circuit-breaker will fail to operate when there is a fault.
Can a fuse take the place of a diode temporarily?
No - a fuse is designed as a safety device - to operate within a specific range. It performs a completely different function to a diode.
What are the properties of a fuse wire?
It has high specific resistance and low melting point.........
Is fuse wire characterized by high resistance and high melting point?
No, fuse wire is characterized by low resistance and a low melting point. This allows the fuse wire to melt quickly and break the circuit when there is an overload of current, thereby protecting the circuit from damage.
What is a fuse wire characterized by?
Low resistance and low melting point by "justquikr.com"
Why can not copper wire be used as a fuse wire?
The fuse needs a low melting point and reletivelyhigh resistance so that it melts at the proper current
Why copper can't be used as fuse wire?
Copper is a metal having high melting point and very low specific resistance. in case of excess current flowing in the circuit it will not be able to melt wire quickly and break the circuit protecting it.
Does a fuse have low melting point?
Yes they do
What is considered a high melting point and what is considered a low melting point?
resistance means the te power to resist the heat or the electric current/ eg: tungsten which is used to make the filament of the bulb has a high melting point even when it burns on a high temperature so it has a high resistance, whereas in the wire of an electrical fuse has a low melting point as it burns at a high temperature...
A fuse has low melting point why?
This is necessary because a fuse is a protection against an overcurrent; excessive current produce melting.
What material is used to make a fuse wire?
The material suitable for making a fuse wire should have a low melting pt. so that it can easily melt and cut off the flow of current and save the electrical appliance...
Will a fuse of a higher amperage rating have a higher melting point link?
No, a fuse of a higher amperage rating will not usually have a higher melting point link. The higher amperage fuse will use a wider link or a link of larger diameter.
Does the material used for a fuse wire need to have a low or a high melting point - a low or high ductility - a low or high resistivity?
The material for the fuse wire should have low resistance and a low melting point. Ductility is a incidental factor. As the current flow nears the fuse rating, the high current flow causes the wire to heat up quickly. It then melts, opening (breaking) the circuit. This is how the fuse limits the amount of current that can flow through a circuit.
what is the meling point of spelter?
Spelter, sometimes known as zinc, is used to fuse metals with a higher melting point. The actual melting point of spelter is 787.15 degrees Fahrenheit.
