When a bimetallic strip made of iron and brass is heated then it bends in the form of an arc with concave towards brass?

When a bimetallic strip made of iron and brass is heated then it bends in the form of an arc with concave towards brass?

When the bimetallic strip which is made up of iron and brass is heated, the metal with the largest coefficient of linear thermal expansion will bend more i.e. brass will expand more and bends toward the iron. And the iron does not bend in the form of concave towards Brass. So, the statement (1) is wrong.

When a bimetallic bar made of brass and iron strips is heated the band bends towards the iron strip the reason for this is group of answer choices?

When this bimetallic strip is heated, the brass expands more than the steel and the strip curves with the brass on the outside. If the strip is cooled, it curves with the steel on the outside. Bimetallic strips are used as switches in thermostats.

What happens when a bimetallic strip is heated?

The bimetallic strips are commonly used in thermostats. It is because the temperature change will bring the mechanical displacement in the metal. 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.

Which metal expands more iron or brass?

6.5: Bimetallic strip When the temperature of the strip is raised, brass expands more than iron. Hence the strip curves with brass curving outwards and iron inwards.

How are bimetallic strips useful?

A bimetallic strip is used to convert a temperature change into mechanical displacement. The strip consists of two strips of different metals which expand at different rates as they are heated. This effect is used in a range of mechanical and electrical devices.

How is bimetallic strip used in fire alarm?

A bimetallic strip in a fire alarm bends to trigger the alarm. Some heat detecting fire alarms rely on a bimetallic strip as the temperature sensor. This strip responds to heat by closing a normally open electrical circuit to activate the alarm.

What metal expands the most when heated?

Answer and Explanation: In referring to a table of coefficients of linear expansion (CLE) for pure metals, one will find that potassium metal expands the most as it has the highest CLE of 85 x 10−6 per ∘ C. The metal after that is sodium metal and then plutonium with CLEs of 70 and 54 x 10−6 per ∘ C, respectively.

Where do we use bimetallic strips?

The bimetallic strip consists of two different metals having different coefficients of thermal expansion. Bimetallic thermometers are used in residential devices like air conditioners, ovens, and industrial devices like heaters, hot wires, refineries, etc.

What devices use a bimetallic strip?

Thermometer and thermostat are examples of bimetallic tip devices. (i) Thermometers: A thermometer uses a bimetallic strip, generally wrapped into a coil in its most used design. The coil changes the linear movement of the metal expansion into a circular movement due to the helicoidal shape it draws.

Which bimetallic strip is used in an automatic fire alarm?

Yes, an automatic alarm is an application of bimetallic strip. The bimetallic strip (made of iron and brass) expands on the occurence of fire. The heat of fire causes the expansion of metals of bimetallic strip. As iron and brass expands at different rate the expansion of bothe metals causes bimetallic strip to bend.