When electrical current flows through a wire, it encounters resistance. This resistance causes the electrical energy to convert into heat energy, heating up the wire.
The rate at which a wire heats up is affected by the amount of current flowing through it, the resistance of the wire, and the material of the wire.
Yes, it can be dangerous if the wire is not properly insulated or if the current is too high. This can cause the wire to overheat and potentially start a fire.
The amount of heat produced by a wire can be calculated using the formula Q = I²Rt, where Q is the heat produced in Joules, I is the current in amperes, R is the resistance in ohms, and t is the time in seconds.
Yes, there are many practical applications such as heating coils in stoves, electric heaters, hair dryers, and electric blankets. It is also used in industrial settings for processes such as welding and soldering.