What is the property of matter behind the working of a bimetallic strip?

Definition: A bimetallic strip works on the principle of thermal expansion, which is defined as the change in volume of metal with the change in temperature.

Which are important properties for selection of bimetallic strip material?

The following are the important properties a material should have to be selected for bimetallic thermometers.

• Coefficient of expansion.
• Modulus of elasticity.
• Elastic limit after cold rolling.
• Electrical conductivity.
• Ductility.
• Metallurgical ability.

What is bimetallic strip state one of its uses?

Bimetal strips are used in miniature circuit breakers to protect circuits from excess current. A coil of wire is used to heat a bimetal strip, which bends and operates a linkage that unlatches a spring-operated contact.

What is bimetallic strip principle?

The principle behind a bimetallic strip thermometer relies on the fact that different metals expand at different rates as they warm up. By bonding two different metals together, you can make a simple electric controller that can withstand fairly high temperatures. This sort of controller is often found in ovens.

Which properties of matter is used in the measurement of temperature?

Expansion of matter is used to measure the temperature. Solids expand very little, gases expand too much, therefore expansion of liquid is commonly used to measure the temperature.

Why does a bimetallic strip bend with changes in temperature?

Brass and Iron together form the bimetallic strip. The rate of expansion and contraction of brass is more when compared to Iron, that is, brass expands more than Iron when heated and contracts faster than iron when cooled. As a result, the bimetallic strip bends with the change in temperature.

Why does a bimetallic strip bend on heating?

The uneven expansion of its constituent metals.

What happens to a bimetallic strip when heated?

When the bimetallic strip is heated, the metal with higher thermal expansion will bend more. Thus they bend towards the metal having a lower thermal expansion.

Is temperature a property of matter?

Temperature is one of the physical properties of matter. The temperature of the matter defines the state of it. Also, there are other temperature-related properties of matter like thermal conductivity, thermal diffusivity and so on.

Is temperature a basic property of matter?

This is a funny question because temperature is a property of matter – a physical property to be exact. This includes the temperature points of changing states – boiling, melting, and freezing points. In terms of matter itself, temperature is directly proportional to the average kinetic energy of particles.

What happens when a bimetallic strip is cooled?

Note: One of the examples of the bimetallic strip is brass and steel. The brass has a higher coefficient of thermal expansion. Thus when heated it will bend towards steel and when cooled the steel will bend towards brass.

Why do substances expand when temperature is increased?

Most matter expands when heated and contracts when cooled, a principle called thermal expansion. The average kinetic energy of the particles increases when matter is heated and this increase in motion increases the average distance between its atoms.

Why does bimetallic strip expand?

Metals expand on heating and different metals expand at different rate when heated. Brass and Iron together form the bimetallic strip. The rate of expansion and contraction of brass is more when compared to Iron, that is, brass expands more than Iron when heated and contracts faster than iron when cooled.

What will happen to bimetallic strips when the temperature increases?

At normal room temperature, the two strips have the same length. However, since brass expands (or contracts) more than iron when its temperature is raised (or cooled), the bimetallic strip will bend one way or another depending on the temperature being above or below room temperature.

What happens when a bimetallic strip is cooled below room temperature?

When the temperature is lower than normal room temperature, the length of the brass will be less than the length of the iron, and so the bimetallic strip will become “U-shaped” with the brass on the topside.

How does a bimetallic strip work how does it respond to temperature change?

A bimetallic strip is made of two different kinds of metals that are laminated into one strip. Each metal responds to heat and cold by expanding a specific amount based on the change in temperature. When heat is applied to the coiled bimetallic strip, it expands and uncoils.