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

Types of capacitor, what about capacitor with dielectric & air electric & ...

what about capacitor with dielectric & air electric & electrolytic capacitor

Expantion, how does expansion occur

how does expansion occur

Gravity free environment vectors and projectiles, Gravity-Free Environment ...

Gravity-Free Environment Assume a zookeeper must shoot a banana from banana cannon to a monkey who hangs from the limb of a tree. This particular monkey has a habit of plummeti

Dynamics, Action and reaction are always equal and opposite.Then,how does a...

Action and reaction are always equal and opposite.Then,how does a body moves?

Explain change in kinetic energy, Two blocks are tied together by a horizon...

Two blocks are tied together by a horizontal string and pulled a distance of 2.7 m across an air hockey table with a constant force of 35 N. The force is directed at an upward angl

A sodium cation has different number of electrons from, A sodium cation has...

A sodium cation has different number of electrons from: (1) O 2-                  (2) F -       (3) Li +                    (4) Al +3 Ans: Li +

Quantum mechanics, how to calculate wave function of particle?

how to calculate wave function of particle?

Explain functions of the commutator, Functions of the commutator:  A co...

Functions of the commutator:  A commutator is a device, which under certain conditions changes ac into dc and vice versa. The commutator is a form of rotating switch placed

What is the charge of the ping pong ball, Q. A neutral Ping Pong ball d...

Q. A neutral Ping Pong ball dangles from the ceiling by a thread. A person chafes a rubber rod with animal fur and then touches the Ping Pong ball with the rubber rod. Afterwar

A 35-kg child is riding on a swing that rises to a maximum h, Neglecting fr...

Neglecting friction, what is the child''s gravitational potential energy at the top of the swing? What is the child''s kinetic energy at the top of the swing?

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