Nichrome wire is an alloy, it is mixture of nickel, chromium etc. Its chemical composition gives high resistivity and good oxidation resistance. Nichrome 80/20 wire is used as heating element such as in heaters, furnaces , home appliances and various other heating applications.
Filament of bulb is made up of tungsten element. Due to high resistivity of tungsten it heats up faster glow up.
Overload is a situation in which extra power is taken from an electrical supply, and the increased current causes the cables to heat up, which may be produce fire ?
Coil of Electric room heater or an electric heater wire is called an element.
Two effects of electric current are: Heating effect. Magnetic effect.
Electric bell works on an electromagnet principle. WORKING :- shows the circuit of an electric bell. It consists of a coil of wire wound on an iron piece. The coil acts as an electromagnet. An iron strip with a hammer at one end is kept close to the electromagnet. There is a contact screw near …
electromagnet,:- A device consisting of a core of magnetic material surrounded by a coil through which an electric current is passed to magnetize the core. The electromagnets can be made very strong and can lift very heavy loads.
Hans Christian Oersted also wondered. He was the first person who noticed the deflection of compass needle every time the current was passed through the wire.
These days Miniature circuit breakers (MCBs) are increasingly being used in place of fuses. These are switches whichautomatically turn off when current in a circuit exceeds the safe limit. You turn them on and the circuit is once againcomplete. Look for ISI mark on MCBs also.
Miniature circuit breakers (MCBs)
