Make Hot Wire with 9V Battery: 200c/300c

  • Context: High School 
  • Thread starter Thread starter yup790
  • Start date Start date
  • Tags Tags
    Hot Wire
Click For Summary

Discussion Overview

The discussion revolves around the feasibility of creating a heating element using a coil of wire powered by a 9V battery, with the goal of reaching temperatures of 200°C to 300°C. Participants explore various aspects including insulation, current requirements, wire materials, and the practicality of using a 9V battery for this application.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests that with sufficient insulation, reaching the desired temperature is feasible, but controlling the temperature may present challenges.
  • Another participant argues that a standard 9V battery may not provide enough current, recommending a more powerful battery, such as a 12V 7.2 AH Gel or sealed Lead-Acid battery.
  • A different viewpoint indicates that a thin wire could reach 200°C with approximately 200mA, and mentions that 9V at 200mA corresponds to a resistance of 40 Ohms, suggesting the use of a long thin wire or a small resistor.
  • One participant proposes that tungsten-based wires could be suitable for achieving the required heating.

Areas of Agreement / Disagreement

Participants express differing opinions on the adequacy of a 9V battery for this application, with some suggesting alternative battery types while others discuss wire specifications. The discussion remains unresolved regarding the optimal approach to achieve the desired heating without a flame.

Contextual Notes

Limitations include the unspecified volume of the material to be heated and the challenges associated with insulation and current supply from a 9V battery.

yup790
Messages
21
Reaction score
0
I am planning in making a boiling tube that heats up to about 200c without a flame. I was thinking a coil of wire and a 9v battery (portable is always better). How would I make the wire hot - 200c/300c with only a 9v battery.
 
Science news on Phys.org
If you insulate your system well enough (that is not trivial), reaching that temperature is easy.
Controlling the temperature can be interesting.
 
mfb said:
If you insulate your system well enough (that is not trivial), reaching that temperature is easy.
Controlling the temperature can be interesting.

Yup, but it isn't going to be done with one of those small PP3 9V batteries, they just don't have the umph,
they can only supply around 300-400 mA and for a relatively short time
You would need a battery that can supply significant current, say a 12V 7.2 AH Gel or sealed Lead-Acid

Dave
 
I don't know how large the volume we want to heat is.
You can make a thin wire visibly glow red with ~2A, using a thinner wire should easily give 200°C with 200mA.
9 V at 200 mA means 40 Ohm, so we can use a long thin wire (or probably a small resistor).
 

Similar threads

Optimum Battery (and Wire) to Power 10x Mini 1.5V Bulbs in Parallel?
  • · Replies 6 ·
Replies
6
Views
2K
PM Generator and battery resistance
  • · Replies 14 ·
Replies
14
Views
2K
I getting my homemade DC motor to work (school project)
  • · Replies 25 ·
Replies
25
Views
8K
High School Why does hot water rise to the top of a water heater?
  • · Replies 66 ·
3
Replies
66
Views
5K
Undergrad How Does Temperature Affect Wire Tension at Constant Length?
  • · Replies 4 ·
Replies
4
Views
2K
High School Coil + zinkplate + copperplate + 9V battery = shock
  • · Replies 2 ·
Replies
2
Views
2K
Trying to impress my 8th grade students, made some unknown stuff
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Heating a Nichrome wire around a glass tube
  • · Replies 3 ·
Replies
3
Views
4K
Nichrome Wire foam cutter/heater
  • · Replies 8 ·
Replies
8
Views
6K
High School How is surface charge accumulated?
  • · Replies 36 ·
2
Replies
36
Views
7K