the fuse in the circuit control the potential difference or current.
Also the fuse is a device that controls the flow of fact that the fuse selection is based on the current fuse capacity. let’s say you have a device rated for 5a than you would use a fuse that’s less than 5a to protect the device and if some current way beyond the border fuse will burn and protect the device. it is generally a thumb rule that most devices do say conductors, CB, fuses or devices that will be part of the electrical circuit will be rated on the basis of current capacity only but when it comes to protecting something from the power supply say the insulator is rated for voltage ratings because they go isolate is of several conduction paths and based on the strength of the breakdown voltage rating of the material being disconnected.
The circuit fuses control the current. if the current rises from a certain threshold it produces a large amount of heat energy that melts the fuse wire. because the circuit is broken and the current supply goes off.
The fuse is a security device connected in series with livewire on the circuit to protect the equipment when the excess current flows. it is the short and thin part of the metal wire that melts when a large current passes through it. if an insecure large current passes through the circuit, the fuse melts and disconnects the circuit before the cable becomes very hot and causes a fire. fuses are usually rated as 5 a, 10 a, 13 a, 30 a, etc.
The following safety measures should be taken when using a fuse in a household electrical circuit:
1. the fuse used shall have a slightly higher rating than the current to be used by the appliance under normal conditions. for example, for a lightning circuit select 5 axes because the current drawn by each lamp is very small (about 0.4 a for a lamp 100 w). in the circuit, 10 100 w bulbs can be used safely because the total current drawn is only 4 a which can be calculated using the formula
P = vi
2. The fuses shall be connected in live wire so that the appliance will not operate after the fuse breaks.
3. switch off the main before changing any fuse.
Does the fuse in the circuit control the potential difference or current?
The fuse is meant to work in case of over current. fuse work is that if you have an over current in the circuit that can damage your equipment, the heat-sensitive metal in the fuse melts due to heat generated by excessive currents, thus damaging the circuit and saving equipment from excessive currents
Excessive currents will cause the fuse to ‘blow’, making the circuit open. the fuses being released will not allow the current to flow, but will also have a large voltage drop across it, essentially the entire supply voltage. the side of the breaking fuse connected to the supply voltage will sit at the supply voltage while the other side of the blown fuse will sit at zero volts. this means the fuse has controlled the voltage to the circuit by dropping it from a value approaching the supply voltage (when intact) to zero volts (one hit).