Thermistors, Physics

Assignment Help:

Thermistors

Insulators and semi-conductors behave in a different way when the temperature increases, because their resistivity decreases. That is: the resistance of an insulator and of a semi-conductor decreases with temperature increase, (their resistance-temperature coefficient is negative!). This feature can be used to advantage as the following example shows.

One example of this effect occurs in a thermistor, which is a thermally sensitive resistor whose resistance alters with temperature; a negative temperature coefficient (n.t.c.) thermistor is one whose resistance reduces with increase in temperature. A thermistor is used in the cooling-water temperature-measuring circuit of a car or lorry; it is inserted in the cooling water and connected in series with the battery and temperature gauge. As the water temperature rises, the resistance of the n.t.c. thermistor falls and allows more current to flow through the temperature gauge; this causes the gauge to indicate variations in water temperature.


Related Discussions:- Thermistors

Condesed matter, sodium metal with a body centred cubic structure has two a...

sodium metal with a body centred cubic structure has two atoms per unit cell. the radius of sodium atom is 1.85 å. calculate its electrical resistivity at 0 oc, if the classical va

Electronics, is voltage source have infinite internal resistance

is voltage source have infinite internal resistance

What are nuclear forces, Q. What are nuclear forces? The force which c...

Q. What are nuclear forces? The force which conquers the electrostatic repulsion between positively charged protons and binds the protons and neutrons inside the nucleus is ca

greatest and least magnitude , The greatest and least magnitude of the res...

The greatest and least magnitude of the resultant of two forces of constant magnitude are P & Q. Proof that when the forces act at an angle of 2 alpha, their resultant is of magnit

Schrodinger''s wave equation in a three dimensional box., Q. Write down Sch...

Q. Write down Schrodinger's wave equation for a particle in a three dimensional box. Solve it to get eigen functions and show that the eigen values are discrete.  Ans. Fr

Vectors and 3 Dimensional Forces, 5 example of Classification and 5 types o...

5 example of Classification and 5 types of Vectors and 3 Dimensional Forces

Graphs, Kinds of graphs in physics

Kinds of graphs in physics

Newtons laws of motion, a body of mass M is acted upon by a force F and the...

a body of mass M is acted upon by a force F and the acceleration produced is a.if three forces each equal to F and inclined to each other at 120degrees act on the same body,the acc

Define the tea in thermos, Define the Tea in Thermos? One liter of tea...

Define the Tea in Thermos? One liter of tea at 90° C is poured keen on a vacuum-insulated container (thermos). The surface area of the thermos walls A=600 cm 2 . The volume am

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