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The same as in a metal wire or any other piece of metal. The free conduction band electrons acting as an electron gas filling the volume of the metal object flow away from an applied negative potential and toward an applied positive potential.
Note that while electrical current flow moves in the metal at a speed approaching the speed of light, the actual speed of movement of the electron gas (and the individual electrons comprising it) is closer to 1 millimeter per hour, due to the fact the electrons are performing random walks as a result of collisions with atoms and other electrons.
Wiki User
∙ 9y ago
Wiki User
∙ 12y agoFor anything to flow there must be a potential. For the heat to flow in your thought experiment, the one end of the bar must be cooler than the other.
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When you heat a metal bar does it get thicker?
Yes, heat does make it expand slightly but, the increase in size is very small.
What happens to the particles in a metal when the metal is heated?
When a metal bar is heated....the particles in the area of the metal bar that is hot start vibrating.. knocking into each other and passing the heat energy on to cooler particles. The cooler end that isn't heated still has a rise in temperature just not as much as the heated area because the heat has almost been diluted.
A hot metal bar is placed into cool water what statement is true?
The temperature of the metal bar decreases.The temperature of the cool water increases.The final temperature of the metal bar will be the same as the final temperature of the water.
Can heat conduct through metal?
By conduction. This means that atoms of the metal become more energetic when heated, and they transfer this energy from atom to atom, so it travels along the bar from the hot end to the cooler end
what is a Metal bar or rod used for stirring fire?
poker
What is the transfer of heat from warm to cold areas called?
If you heat one end of a metal bar then the heat passes along the bar by a process known as conduction.
Why are the sides of the saucepan made out of steel?
So that the heat from the fire or hob that is underneath it can heat the object inside as metal is a conductor.
How does heat travel along a metal?
By conduction. This means that atoms of the metal become more energetic when heated, and they transfer this energy from atom to atom, so it travels along the bar from the hot end to the cooler end
When you heat a metal bar does it get thicker?
Yes, heat does make it expand slightly but, the increase in size is very small.
What does it mean if something is a conductor of heat?
It means that heat is transferred fairly fast through it. (A metal bar is a good conductor of heat, while wood is not). For example, you will not be able to touch a metal bar whose one end is in a blazing fire. While you can easily hold a torch of which one side is burning.
How does heat travel through metal?
the answer is that it travels by conduction. thank you.
What happens to the particles in a metal when the metal is heated?
When a metal bar is heated....the particles in the area of the metal bar that is hot start vibrating.. knocking into each other and passing the heat energy on to cooler particles. The cooler end that isn't heated still has a rise in temperature just not as much as the heated area because the heat has almost been diluted.
How could you modify the equipment to increase the rate of heat transfer from the hot cup to the cold cup?
make the calorimeter a metal bar
What is a definition of a fret on a guitqr?
the metal bar indicating each unit along the strings- can denote semi or complete tones, depending.
How could heating a bar magnet reduce its magnetism?
Heating a bar magnet could reduce its magnetism because the heat, by raising the energy level in the metal, disorients the atoms, which disrupts the magnetism.
Why heat can not be transferred in this way in an iron rod?
heat is transferred only from high energetic concentration to low energetic concentration. therefore heat cant be transferred in any usual way.
What is motional emf?
Induced Current and Motional EmfThe electric field in the metal bar causes a potential difference of V = El = vBl. If the bar slides along metal rails, as in the figure below, a closed circuit is set up with current flowing in the counterclockwise direction, up the bar and then around the metal rail back to the bottom of the bar. TInduced Current and Motional EmfThe electric field in the metal bar causes a potential difference of V = El = vBl. If the bar slides along metal rails, as in the figure below, a closed circuit is set up with current flowing in the counterclockwise direction, up the bar and then around the metal rail back to the bottom of the bar. This is called an induced current.The moving bar is a source of an electromotive force, called motional emf, since the emf is generated by the motion of the bar.The force is defined as:The magnitude of the induced emf can be increased by increasing the strength of the magnetic field, moving the bar faster, or using a longer bar.ExampleA bar of length 10 cm slides along metal rails at a speed of 5 m/s in a magnetic field of 0.1 T. What is the motional emf induced in the bar and rails?Now that we've defined motional emf, solving this problem is simply a matter of plugging numbers into the appropriate equation:his is called an induced current.
