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A flame rod is a simple piece of heat-resistant metal (nichrome, inconel, etc) in contact with a flame. A flame consists of ionized particles undergoing chemical reactions and therefore is conductive. The flame rod takes advantage of that fact. The rod has a small potential on it and when the flame touches it, a small current flows from the rod through the flame to ground. This current is detected and uses to "prove" the flame. A flame acts as a diode but I don't recall the direction of electron flow and that effect isn't used in this application. The rod's response is instantaneous. That, and there being nothing to degrade, are the two main benefits. The major detraction is that active, powered electronics are needed to process the signal. All pilotless gas systems use flame rods. If the ignition system is by spark then the flame rod and the ignition rod may be the same. Other systems use separate spark and flame rods. Yet other ignition systems such as the hot body ignitor don't involve the use of sparks at all. A similar application is the pilot light sustainer. This little gadget detects when the pilot light goes out and sparks to relight it.
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Wrap a thin paper strip tightly around an iron rod . try to burn the paper with candle while rotating the iron rod continuously . does it burn .explain your observation?
If you introduce the rod with the round strips into the flame of a candle, the paper will not catch fire. The fire will lick the paper but not burn down until the iron rod becomes hot. This is because iron rod just like any other metal is a good conductor of heat, it leads away the heat obtained by paper from the candle flames. Replace the iron rod by a wooden stick and paper will burn because wood is a poor conductor of heat. With copper rod the experiment is more successful.
How do you produce such flame?
Burn hydrogen
Which substance will burn in bunse to give a brick red non luminous flame?
NaCl will burn with a brick-red colour in a non-luminous Bunsen flame.
What is the meaning of smolder?
Burn slowly with smoke but no flame.
What is 4 differences between a yellow safety flam and a blue heat flame produced by a Bunsen burner?
The blue flame is really hotter than the yellow flame. If you put your hand over a blue flame and skim through it, it would burn you but if you put it over a yellow flame it wouldn't burn you that much.
What does a flame need to burn?
For a flame to burn it needs fuel, oxygen, and heat.
Wrap a thin paper strip tightly around an iron rod . try to burn the paper with candle while rotating the iron rod continuously . does it burn .explain your observation?
If you introduce the rod with the round strips into the flame of a candle, the paper will not catch fire. The fire will lick the paper but not burn down until the iron rod becomes hot. This is because iron rod just like any other metal is a good conductor of heat, it leads away the heat obtained by paper from the candle flames. Replace the iron rod by a wooden stick and paper will burn because wood is a poor conductor of heat. With copper rod the experiment is more successful.
How does a flame rod work?
The main circuit board in your furnace sends a small ac signal to the flame rod so now you have an ac potential from the body of the furnace to the flame rod, When the flame comes on between the body of the furnace and the rod it rectifies the ac in to dc, The flame actually acts like a diode. When this dc voltage is sensed by the control board it knows there is a flame present and thus keeps the gas valve on. Hope this helps
What homophone means to burn with sudden flame?
The homophone that means to burn with sudden flame is "flair" - this refers to a sudden burst or flare of fire or light.
What will not burn?
flame retardant
What will burn?
flame retardant
How do you obtain blue flame on burn-sen burner?
Increase the air flow by opening the circular valve on the stem of the burner. This will cause the flame to burn more intensely and with a blue flame. When the valve is closed, the flame will burn yellow and cooler - more like a wax candle's flame.
When fossil fuels burn do they produce oxygen?
No, the flame needs the oxygen to burn. Without oxygen, the flame would go out.
Is sodium easily burn with a small flame in air?
The sodium is alkali metal it cannot be easily burn in a small flame
Why you have an Olympic flame?
to burn ppl
Why do you have an olympic flame?
to burn ppl
How do you produce such flame?
Burn hydrogen
