Question 1:
Why does the cord of an electric heater not glow while the heating
element does?
Solution:
The heating element of the heater is made up of alloy which has very high
resistance so when current flows through the heating element, it becomes too
hot and glows red. But the resistance of cord which is usually of copper or
aluminium is very law so it does not glow.
OK now I understand. Thanx for the help
ReplyDeleteThis low not law
ReplyDeleteGood simple and easy to understand ... Also helped in understanding how to solve these type of questions...
ReplyDeleteI love this site
ReplyDeleteVery bad sitr
ReplyDeleteBadest site
ReplyDeleteGazab.
ReplyDeleteBut according to jules law of heating the one which passes more current will heat up more right? As H proportional to current squared..... So cord should burn with more heat right?....
ReplyDeleteH=I^2rt
DeleteSince H is directly proportional to resistance,As the resistance increases H also increases..As a result the heating element becomes too hot and it glows!
H is directly proportional to current square but only if resistance(r)remains same but here r is changing
DeleteVery good answer...
ReplyDeleteEasy to understand..
Thanks for the help..
☺️ЁЯЩПЁЯСМ
Can we write this as a bad conductor of heat and electricity
ReplyDelete