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

Production of electricity by friction, Production of electricity : Very...

Production of electricity : Very large amounts of electrical energy lie dormant in the atoms of every speck of material in the universe. Whilst the atoms remain electrically ba

Continuous emission spectrum, (i) It has of continuously varying wavelength...

(i) It has of continuously varying wavelengths in a exact wavelength range. (ii) It is given by solids, liquids and highly compressed gases heated to high temperature. (iii)

LASER, What is LASER? describe the construction and working of He-Ne Laser ...

What is LASER? describe the construction and working of He-Ne Laser with suitable diagram

Ultrasonic-interferameter , Ultrasonic-interferameter 1.defenition 2.app...

Ultrasonic-interferameter 1.defenition 2.applications 3.uses 4.free lenth 5.Compressibility Ans)An Ultrasonic Interferometer is a easy and direct device to determine the ul

Dynamics of circular motion:force on the particle, FORCE ON THE PARTICLE: F...

FORCE ON THE PARTICLE: For a mass m to have acceleration, a force given by F = ma is always required. In uniform circular motion, acceleration is of value v2/t and is directed tend

Draw a free-body diagram for a submerged beach ball, Draw a free-body diagr...

Draw a free-body diagram for a submerged beach ball as it rises toward the surface just after being released. Recognize the forces acting on the beach ball and show the directi

Occams razor, Occam's [or Ockham's] razor (William of Occam [or Ockham]; c....

Occam's [or Ockham's] razor (William of Occam [or Ockham]; c. 1340): The recommendation that the simpler a theory is, the better. If two of the theories predict phenomena to t

What is packing polymorphism, What is packing polymorphism When polymor...

What is packing polymorphism When polymorphism exists as a result of change in crystal packing, it is called packing polymorphism. Polymorphism can also result from the existen

Ray diagram, how to make a ray diagram ?? and what are f, p ?? and what is ...

how to make a ray diagram ?? and what are f, p ?? and what is refraction index?????

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