Special resistor materials: the lead alloy, Physics

Assignment Help:

The lead alloy: Most of the soldering in the electronic industry is carried out using tin lead alloy. Pure lead metals at 3270C, whereas tin melts at 2320C and the mixture of tin and lead will melt at 1880C when ratio of tin to lead is approximately 60/40. As the ratio moves from 60/40 area, the solder goes through a plastic or pasty stage instead of changing from solid to liquid. The tin lead ratio at which the solder goes directly to liquid stage is called eutectic composition and the resulted alloy is known as eutectic alloy.

Manganin: Manganin is an alloy of copper (86%), Manganese (12%), and nickel (2%).

Properties:

1.      Its electrical resistivity is 48*10-8 ohm-m.

2.      Its resistance is stable over a wide range of temperature for a long time.

3.      It melts at 1020 degree centigrade.

4.      Its specific gravity is 8.2.

5.      It can be drawn into wires.

6.      Since its resistance temperature coefficient is larger at higher temperature the permissible working temperature of Manganin is low (600C to 700C).

Uses: It is commercially used as a standard resistor and for the instrument shunts.

 

 


Related Discussions:- Special resistor materials: the lead alloy

Cross-sectional areas of pistons - force, The cross-sectional areas of the ...

The cross-sectional areas of the pistons in the system shown below have a ratio of 25 to 1. If the maximum force that can be applied to the small piston is 12 N. What is the

Solid state, increase in potential with the increase in temperature differe...

increase in potential with the increase in temperature difference of two ends in a solid is called

Universal constant of gravitation, Universal constant of gravitation; G: ...

Universal constant of gravitation; G: The constant of proportionality in Newton's law of universal gravitation & which plays an vital role in A. Einstein's general relativity.

Heat energy, A body of mass 500g IS heated such that its température roses ...

A body of mass 500g IS heated such that its température roses from -4*c to 100*c calculate the total heat energy consumed

Explain about the intermodal dispersion in optical fibers, Explain about th...

Explain about the intermodal dispersion in optical fibers. Intermodal Dispersion Δτ im ) This dispersion arises even when light that is launched into the fiber is s

Explain deflection magnetometer, Its working is based on the principle of t...

Its working is based on the principle of tangent law. It having of a small compass needle, pivoted at the centre of a circular box. The box is reserved in a wooden frame having two

Maxwells demon, Maxwell's demon (J.C. Maxwell): A thought experiment d...

Maxwell's demon (J.C. Maxwell): A thought experiment demonstrating the concepts of entropy. We have a container of gas that is partitioned in two equal sides; each side is in

Calculate the temperature of phase transition, An element exists in two sol...

An element exists in two solid phases (labelled P1 and P2). The standard molar entropies of P1 and P2  are 21.9 J mol -1 K -1  and  23.3 J mol -1 K -1  respectively. The

Equilibrium, A bar has a 20N weight at one end. You have a weight of 15N to...

A bar has a 20N weight at one end. You have a weight of 15N to hang somewhere on the bar so that the bar is in equilibrium. Where would you hang the 15 N weight on each of these ba

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd