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

Define the term scanning electron microscope, Define the term scanning elec...

Define the term scanning electron microscope. Scanning electron microscope: The scanning electron microscope (SEM) is a form of electron microscope which images the sample s

Relativity, at what velocity a clock should move so that it seems slow by o...

at what velocity a clock should move so that it seems slow by one minute in a day?

Disadvantage of low power factor, Disadvantage of low Power Factor  We ...

Disadvantage of low Power Factor  We know that   P = V I cos φ,  for particular amount of power at constant voltage, Power (P) and voltage (V) in the above expression of

What is hologram, What is hologram? Holography When an entity ...

What is hologram? Holography When an entity is photographed by a camera a two dimensional image of three dimensional objects is obtained. A three dimensional image of

Explain capacitor, A new 90.0-V battery with a storage capacity of 2.5 x 10...

A new 90.0-V battery with a storage capacity of 2.5 x 10 4 C charges a 6800 μF capacitor with the switch in position A. Then the switch is thrown to position B to discharge th

Find the distance between two adjacent crests, In the figure below, the han...

In the figure below, the hand moves the end of the Slinky up and down through 2 complete cycles in 1 seconds. The wave moves along the Slinky at a speed of 0.60 m/s. Find the dista

The acceleration of a falling ball, The acceleration of a falling ball ...

The acceleration of a falling ball The change in speed per second of a moving body is called the acceleration. When it is constant as in the case of a ball falling under the ac

Find kinetic energy, A particle with mass m = 2:5 is moving along a straigh...

A particle with mass m = 2:5 is moving along a straight trajectory. The distance covered by a particle is described by the function S(t) = t 3 + 2t 2 , where t > 0 is the time

Force, Force: Force may be defined as a push or a pull upon an object. ...

Force: Force may be defined as a push or a pull upon an object.  In the English system the pound (1b) is used to express the value of a force.  For example, we say that a force

Expression for the total bound electric field, A weakly guiding optical fib...

A weakly guiding optical fibre propagates just two bound modes with scalar transverse electric fields ψ 1 (x,y) and ψ 2 (x,y), and propagation constants β1 and β2, respectively. At

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