What happens when electric current passes through the nichrome wire?
Table of Contents
What happens when electric current passes through the nichrome wire?
Take about 10 cm long piece of nichrome wire and tie it between the nails. The wire gets hot when an electric current passes through it. This is the heating effect of the electric current.
What does nichrome wire do in a circuit?
Nichrome wire is an alloy made from nickel and chromium. It resists heat and oxidation and serves as a heating element in products such as toasters and hair dryers. Hobbyists use nichrome wire in ceramic sculpture and glassmaking. The wire can also be found in laboratories, construction and specialized electronics.
Why does nichrome wire have a high resistance?
Nichrome alloy is a mixture of two elements- 80% Nickel and 20% Chromium. Even at 0 K temperature the specific resistivity of Nichrome is very high and it varies linearly with increase in temperature. It has a high specific resistivity due to which it opposes the flow of current and hence it has a high resistance too.
What is happening in a wire when a current flows?
An electric current flows when electrons move through a conductor, such as a metal wire. The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance.
When electric current from a cell is passed to a Nichrome wire What changes would you observe what is the energy conversion in this process?
When a current passes through a wire, a part of the electrical energy is converted into heat energy and the wire gets heated. This is known as heating effect of electric current.
How does the Nichrome wire becomes red hot while passing electricity through the circuit?
Answer: The nichrome wire has become hot because the electric current passing through it has produced heat in it. This is the heating effect of current. (6) We should not keep the switch in the ‘on’ position for a long time otherwise the electric cell will get damaged and become weak very quickly.
Is nichrome wire a good conductor of electricity?
In metal, a wire of nichrome (alloy of mainly nickel and chrome) is a hard material to conduct electricity (electrical resistance is high). When electrified into a material with high electrical resistance, heat is generated. For this reason, a nichrome wire is used for electric stoves and toasters.
Is nichrome wire a conductor or insulator?
Nichrome is a conductor. It is used in electric heaters.
What is the resistivity of a Nichrome wire?
Resistivity of some common materials
| Material | Resistivity (OHM-CMIL/FT) | Resistivity (10−6 OHM-CM) |
|---|---|---|
| Nichrome | 675 | 112.2 |
| Nichrome V | 650 | 108.1 |
| Nickel | 41.69 | 6.93 |
| Platinum | 63.16 | 10.5 |
Does the resistance of Nichrome wire change with temperature?
Like all conductors nichrome’s resistance varies with its temperature. Where α is the temperature coefficient of resistivity, Rₒ is the resistance at the reference temperature, Tₒ, which is usually 20°C. For nichrome, α is often given as a constant ≈ 0.00017 °Cˉ¹.
When electric current from a cell is passed through a Nichrome wire tied between the two iron nails What changes would you observe?
When a current passes through a wire, a part of the electrical energy is converted into heat energy and the wire gets heated. This is known as heating effect of electric current. However in an electric bulb the filament gets hot which in turn glows and produces light.