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i am trying to make a heater out of nichrome wire. i have got a heating element (100 W) made specifically for 9V . but when i connected it to the battery, after few seconds of heating the element my battery heated up and i had to remove the connections.
what am i doing wrong

P.S.
the heating element is connected to a stainless steel glass for heating 250-300 ml water to about 100 degree celcius.

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#### Is stainless steel glass anything like transparent aluminum ?

Glass, like a cup, not the substance...

Thanks, this language offers so much for humorous interpretation.

You do know where transparent aluminum was invented ?

Hmmm... Interesting!

I'd like to have some of that... (Though I see that it's only 80% transparent, so I think I'll stick to plexigkass :)

Star Trek IV movie where Kirk and group travel back in time to retrieve a mother whale to save the future and Scotty teaches a SF plastic formulator how to make a transparent aluminum for a sea water tank to transport wales in a stolen Klingon ship..

https://en.wikipedia.org/wiki/Star_Trek_IV:_The_Vo...

You need a bigger battery!

A 9V battery can't supply enough power (amps, aka current). You need a current source that can supply at least 12 amps.

Your battery has more internal resistance than the nichrome wire, you need a bigger battery! No way a small 9V battery can deliver that much current (11A), they are often rated 500mA maximum, and <100mA recommended. You would need to connect over 20 batteries in parallel for that.

+1

No way a 9V rectangular battery can supply that much power.

Ye cannae change the laws of physics

Your 9V battery is not a magical perfect power supply (no real world power supply is). The battery has an inner resistance. It works like a real resistor . Any current flowing through your heater will also flow through the battery - and therefore this inner resistor. So when your heater heats up, this inner resistor heats up too.

What kind of battery do you use? Did you do the math about how much energy is needed for the heating / how much energy is in the battery?

Your drawing FAR too much current from the battery. A 9 volt battery - square type - is only capable of milli amps.

Your project is never going to happen.