Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
The temperature co-efficient of resistance:
The temperature co-efficient of resistance is defined as;
The Fractional change in resistance from 0ºC, per degree temperature change.
and may be represented graphically as shown below.
The graph is reasonably linear for many materials over a moderate temperature range (0º - 200ºC).
The units are ºC because the ohms cancel out in the calculation.
Materials whose resistance increases with increasing temperature have a positive temperature co-efficient of resistance.
Materials whose resistance decreases with increasing temperature have a negative temperature co-efficient of resistance.
Some materials have very small temperature co-efficients of resistance and are used where it is important that the resistance does not change with temperature. Examples are Manganin and Eureka.
Q. A beam of electrons travelling with a speed of 4 X 10 7 ms -1 is projected normal to a magnetic field of B = 10 -3 Wb m -2 . What is the path of the beam in the magnetic fiel
If a particle is projected vertically upward in a constant gravitational field with an initial speed v 0 . If there is a retarding force proportional to the square of the instantan
In an ideal transformer , the no. of turns in primary & secondary are 200 & 1000 respectively .If power input to primary is 10kW at 200V.Calculate i)output voltage ii)current in
what is ether medium
Forces on a Pendulum The weight, force because of tension, and total force exerted on the bob of a pendulum are displayed.
expression for the interference in transmitted light through thin films
Does solar radiation contain a complete spectrum of all forms of electromagnetic radiation? Yes it does. It have all the forms of radiation, but 99% of its energy is carried
In a certain cathode-ray tube, a beam of electrons, moving at a constant velocity, enters a region of constant electric force midway among two parallel plates that are 10.0 cm long
Why because it is not a source as Li-ion battery. If we want to measure the voltage(build in voltage) with in the diode we have to use the external source. We can''t directly measu
It is the demagnetising force which is necessary to neutralize completely the magnetism in the magnetism material after the external magnetic field is reduced to zero.
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd