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!
How do impurities and temperature affect electrical resistivity of metals?
Ans:
Temperature effect on resistivity:
Any increase in temperature of a conductor increases thermal agitation of metallic ions as they vibrate about their mean positions. This reduces the mean free path and restricts the flow of electrons, hence reducing the conductivity of material and increasing its resistivity.
Ρt = Ρω [1+ α0 (t− 20)]Ρt → resistivity at temperatureΡ20 → resistivity at 200c.α0 → Coefficient of temperatureWhich is positive.
Reaction involving cleavage of with removal of 'H' as proton Alcohols are stronger acids as compared to terminal acetylene but are not acidic enough to react along with aqueous
Compare the combustion energy stored in a 1 litre bottle of propane and butane. Suppose that the product temperature is 100°C. The density of liquid propane is 0.493 g cm -3
Which of the following halides has maximum melting point: (1) NaCl (2) NaBr (3) Nal (4
Which is a better coolant, Freon 11 or Freon 12? why?
list of all isotopes
#question:- What are the theories of catalysis?
When α -particles are sent through a thin metal foil, most of them go straight through the foil because (one or more are correct) : (1) Alpha particles are much heavier than ele
How many grams of CO2 are produce if 42.0 mol of LiOH react?
Electrovalent compounds are: (1) Good conductor of electricity (2) Polar in nature (3) Low M.P. and low B.P. (4) Easily available Ans: Polar in nature
How can we calculate the rate of effusion of nitrogen gas from a cylinder and How much time it will take?? Ans) rate of effusion=r=(volume of nitrogen gas effusing from the cyl
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: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd