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Heating Effect of electric current

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal 1 Comment

Question 1 How heat is produced  when electric current is passed through a conductor? Question 2 Define Joule's law? Question 3 How does electric heater,iron and water heater work on heating effect of current? Question 4 Why does filament of an electric bulb is made up of tungsten? Question 5 Why electric fuse in the electric circuit melts when large current flows … [Read more...] about Heating Effect of electric current

Resistance

Last Updated on May 4, 2020 By Mrs Shilpi Nagpal Leave a Comment

Resistivity

Question 1 A piece of wire is redrawn  by pulling it until its length is doubles.Compare the new resistance with the original value? Question 2 How is the resistivity of a material related to the use of that material? Question 3 On what factors does the resistance of a conductor depends? Question 4 Why connecting wires in an electric circuit are made of Cu and … [Read more...] about Resistance

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