Do electric heaters need high or low resistance?

Do electric heaters need high or low resistance?

Resistance (R) heating elements generate heat because the current (I) flowing through them is sufficient to generate power (P) as heat, since P=IxIxR. You need high enough resistance to generate IxIxR, but you are limited by the voltage of your electrical supply (typically 110 or 220 volts).

Why should a heating element have high resistance?

Specific resistance is the property of a conducting material to provide resistance per unit length and cross-sectional area to the flow of current when a voltage is applied on it. The heating element of an electric heater converts electrical energy into heat energy, therefore it should possess high specific resistance.

Why are heating wires said to have high resistance?

In case of heater, the consideration for heating is power required. The material is having high temperature withstanding capability, which is the prime requirement. The material like nichrome has high value of specific resistance, hence its resistance will be higher as compared to copper or aluminum.

How do I calculate the resistance of my electric heater?

Ohms law states that V=IR or I=V/R. Substitute V/R for I in the power formula gives us P=V/R*V or V*V/R, so resistance of the element should be the voltage squared divided by the power.

What is the resistance of electric heater?

The resistance of the heater is 52.9 Ohms.

Which material is used in electric heater?

Nichrome: Most resistance wire heating elements usually use nichrome 80/20 (80\% Nickel, 20\% Chromium) wire, ribbon, or strip. Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time.

What is the resistance of the heating element?

A good element will have a resistance between 5 and 25 Ohms.

How does a resistance heater work?

“Resistors work by converting electrical energy to heat energy; in other words, they get hot when electricity flows through them. As a result, heating elements provide a sturdy electrical component that produces heat when a large electric current flows through it.

What is the resistance wire used in electric heating elements usually made of?

Nichrome
Nichrome: Most resistance wire heating elements usually use nichrome 80/20 (80\% Nickel, 20\% Chromium) wire, ribbon, or strip. Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time.

What are the properties of high resistance heating element?

The most important heating element characteristics are sufficient resistivity, high oxidation resistance, low-temperature coefficient of resistance, high toughness, and high melting point.