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

Two equipotential surfaces , a) Can a gravitational field be added vertoria...

a) Can a gravitational field be added vertorially to an electric field to get a total field? Describe it. b) Can two equipotential surfaces cut down each other? describe it.

#title. entopy., what is entropy and how is it useful in our everyday life?...

what is entropy and how is it useful in our everyday life?

Laser, what is the importance of laser?

what is the importance of laser?

Calculate the velocity of rock thrown upward, A rock is thrown upward with ...

A rock is thrown upward with a speed of 26 m/s. How long after it is thrown will the rock have a velocity of 48 m/s toward the ground?

#Radioactivity, why two alpha particles are not released simultaneously in ...

why two alpha particles are not released simultaneously in a radioactive decay???

Acceleration, Jason and his sister, Tara, are riding bicycles. Jason tries ...

Jason and his sister, Tara, are riding bicycles. Jason tries to catch up to Tara, who has a10.0-s head start .

In the nucleus of 20 ca 40 there are, In the nucleus of 20 Ca 40   there ...

In the nucleus of 20 Ca 40   there are: (1) 40 protons and 20 electrons (2) 20 protons and 40 electrons  (3) 20 protons and 20 neutrons (4) 20 protons and 40 neutrons

Paper capacitors, In this type of capacitors the dielectric consists of one...

In this type of capacitors the dielectric consists of one or more layer of extremely thin craft paper which looks very much like cigarette paper. The metal plates consist of alumin

Image formation for plane mirrors, Image Formation for Plane Mirrors No...

Image Formation for Plane Mirrors Not all people who are performance the object within the mirror will sight along the similar geometrical line of sight. The precise direction

Calculate the concentration of hemoglobin, A dual-wavelength spectrometer u...

A dual-wavelength spectrometer uses 780 nm and 830 nm. The molar extinction coefficients for oxy-hemoglobin (HbO 2 ) and deoxy-hemoglobin (Hb) at these two wavelengths are: e_HbO 2

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