Why the filament of bulb has high resistance?

Higher than ordinary wires. Explanation: The filament of the bulb has higher resistance than ordinary wires because the resistance of bulb is made of tungsten which offers very high resistance than any other wires. 2) It doesn’t oxide readily at high temperatures.

Why is a copper wire not used in the filament of a bulb?

Copper wire cannot be used to create an electrical bulb filament, because copper wire has very low resistance. Therefore, the light does not shine until the current is removed. It will also melt-the filament must be white-hot for any application.

Why a copper wire is not used in making the filament of electric bulb and as a heating element of heater?

Answer: 1) Copper wire is not used in the filament of an electric bulb because copper element have very low resistance and the bulb will not glow if electricity is passed through it.

How is a filament of the bulb different from connecting wires?

a connection wire is used to transfer charges from one point to another that offers a very low resistance. while bulb filament offers high resistance thus heat is realised.

Does filament have high resistance?

Incandescent filaments are very low resistance of only a few ohms when cold and or lit by low voltages. They only reach the expected resistance of R= V^2/P when V is the rated voltage and the filament heats up.

Would a light bulb filament have a high or low resistance?

The filament in an incandescent bulb does not have a constant resistance. If you take a bulb and increase the voltage across it, the current increases too. An increase in current means the bulb gets hot—hot enough to glow. As the temperature increases, however, the resistance also increases.

What is the filament of a bulb made of and why?

Filaments in incandescent light bulbs are made of tungsten. Whenever an electric current goes through the filament, the filament glows. It may also be known as the electron emitting element in a vacuum tube.

How is copper used in light bulbs?

Copper is a metallic mineral substance and is used in the production of incandescent light bulbs because it conducts electricity very well. Copper, is used to make the wires that lead into the main body of the bulb.

Why does only the filament glow?

The resistance of electric line wires is very, very less than that of the filament of the bulb. Therefore, the current through high resistance filament produces more heat which makes it glow.

Why does the metal filament give off light but the connecting wires do not?

As electricity flows through the wire, it heats up. As it heats up, the wire emits most of its heat as infrared radiation. The connecting wires conduct electricity into the filament. They are deliberately kept relatively cool, since they are not inside the glass globe and unable to shine light into the room.

What happens to the resistance of the filament in a light bulb as the filament heats up?

A filament lamp is a common type of light bulb. It contains a thin coil of wire called the filament. This heats up when an electric current passes through it, and produces light as a result. The resistance of a lamp increases as the temperature of its filament increases.

Why is higher resistance brighter?

High resistance bulbs are brighter in series circuits Brightness depends on both current and voltage. So in series high resistance bulbs are brighter because they have a bigger p.d. across them. In parallel circuits low resistance bulbs are brighter because they have a bigger current through them for the same p.d.

Why does the resistance of a light bulb increase with temperature?

The more energy that is put into the bulb, the harder it is for the current to flow – the resistance of the bulb increases. As the potential difference increases, so does the temperature of the thin wire inside the bulb, the filament. Does a light bulb have a high or low resistance?

Why don’t the filament wires of a light bulb glow?

Some heat is generated by resistance in the connecting wires, and some flows from the filament wire into the contacts, but not nearly enough to make the connecting wires glow.

How does temperature affect the performance of a filament lamp?

As the potential difference across a filament lamp is increased, the current increases and the energy dissipated, as heat, increases, resulting in a filament operating at a higher temperature. As the temperature increases, resistance of the filament also increases.

Why is the resistance of a filament lamp non-ohmic?

The resistance of a filament lamp or bulb changes with the temperature of the filament as the potential across it increases and this means it is non-Ohmic. Understanding the resistance of a filament lamp or bulb and why it changes gives insights into a variety of electrical and electronic components that are classed as non-Ohmic.