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What is the difference between a resistor and a fuse?

What is the difference between a resistor and a fuse?

A fuse is a wire that breaks when a certain current passes through it.

a resistor is a component that adds electrical resistance.

a resistor limits the current by its resistance value measured in ohms. a fuse limits overcurrent damage by opening the circuit above a certain current value. the fuse when it is intact has little resistance.

A fuse lets the current flow through until the current is increased to such a level that the fuse will open the circuit and it will not transmit any current.

a resistor will reduce the amount of current flowing in a circuit at a fixed value unless you increase or decrease the voltage. The

resistance is a material that applies an electric current to cross it … it’s a barrier to electric current … while a fuse is a piece of wire that has a low melting point compared to other circuit elements, wiring or coils, so that in case of short circuit or overload, it can easily break to save the electrical devices … always use a nominal fuse in the circuit, otherwise the fuse is damaged … resistance is an element the electrical circuit which limits enormously the flow of current, Thus, a resistance limits the processing capacity of the circuit. A fuse is a good conductor of electricity, but has a lower melting point, if excessive current is heated by the heat generated, this element will melt earlier than other parts. heat up, break the circuit thus protects the system

the fuses are designed to fail, the resistors are not.

A fuse will allow a certain current to flow in a circuit to a certain point (its capacity). if this capacity is reached or begins to exceed what the fuse can handle, the fuse itself is designed to fail, for example. the element in the fuse will burn out by stopping the flow in the circuit / cutting the circuit. This will prevent damage to the electrical appliance and prevent an electrical fire.

a resistor is similar because it is designed to limit the amount of current flowing through a circuit, but it is not designed to fail.

The fuse is a bit like a security for a circuit or electrical device. resistance is more critical to device operation and varies with complexity.

A fuse is designed to open when it exceeds its rated value, interrupting the circuit, protecting the wiring and possibly the user of an electrical device.

A limitation is applied to the voltage in a circuit that a fuse is used to protect, an arc between the open circuit terminals must be reliably interrupted and it can not be tolerated in the metal gas that separates them during the arc formation. In the United States, automotive cartridge fuses are generally rated at 32V, and fuses of the same form factor are also used in the equipment powered by the sector, which has caused some tragic accidents.

I remember hearing about an event in which someone, perhaps unaware of this limitation, would have purchased multimeters capable of measuring up to 1000 volts for sale without consulting the schematic diagram or the size of the fuses, so that a user, who normally should not have to Examine a schematic diagram and may not have one. You still have one to read the power and plug it into a 480 V power supply panel.

the fuse opened without interrupting the circuit and the destructive failure of the meter blinded it. On the other hand, a resistor is designed to survive within the limits of its rated current, limiting the current flowing in a circuit and (possibly) reducing the available voltage beyond its location in a circuit. Resistors are sometimes used as fuses, but as they are not designed to operate reliably in an open circuit, they are not allowed in applications where injury prevention, personal safety or fire prevention is a problem. goal. indeed, they can catch fire if used beyond their capabilities.

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