Batteries, Resistance, and Current

The current has a positive charge in one side of the coil and it transforms to negative when it gets to the other side of the coil. This charge controls the magnetic field, making the like charges repeal and the opposite charges attract.

A fuel cell is, in principle, a very simple electrochemical device. The chemical reaction that powers hydrogen fuel cells is the same as that which occurs when hydrogen burns. The chemical equation for this reaction is: 2H2 + O2 ( 2H2O + energy. "Normally hydrogen burns, reacting with oxygen from the air, producing water, heat and light. ... In the fuel cell the chemical reaction is exactly the same, but instead of producing light and heat energy, electrical energy is produced."2 All fuel cells consist of an electrolyte (a substance that allows only the passage of ions) sandwiched between two electrodes. When a fuel containing hydrogen is passed over the negative electrode, otherwise known as an anode, it is ionized. Ionization of the fuel, often accomplished with the assistance of a catalyst, removes electrons from the hydrogen creating positively charged hydrogen ions and negatively charged free electrons. Since only the ions can pass through the electrolyte situated between the electrodes, the electrons must find another route to the positive electrode or cathode, where they will be reunited with the hydrogen ions and combined with oxygen atoms to form water. The electrons passing around the electrolyte constitute an electric current, and thus can be used to provide power during their journey from anode to cathode.3

* The battery applies a voltage to the plates, charging one plate positive and the other plate negative. Alpha particles constantly released by the americium knock electrons off of the atoms in the air, ionizing the oxygen and nitrogen atoms in the chamber. The positively-charged oxygen and nitrogen atoms are attracted to the negative plate and the electrons are attracted to the

the chemical energy stored in batteries gets transformed into electrical energy through the wires, then gets transformed into light energy and thermal energy that you see.

In the story "Energy story" it talks about the structure of an atom and electrons and how electrons can move easier in somethings than in other things, like in paragraph 21-22 it says that thing like rubber cloth glass and dry air are good insulators, which means that electrons don’t move as well as in things like copper, aluminum, and steel.

What are some of the basic components that make up simple circuits and what do they do?

In paragraph eleven of "Energy Story" it explains how electrons can work. The author states "Electrons can be made to move from one atom to another." and continues to "When

- The magnetic field does not change the speed of the electrons. Since the magnetic field is always perpendicular to the velocity, only the electron movement direction changes and not the speed.

Conductor – conductor is an object or type of material that allows the flow of electrical current in one or more directions. The electrons move easily to the other side, away from the object

3) What do the rate of change values you just calculated represent? Why are some positive and some negative?

Batteries store energy in chemical form. They release energy by pumping electrons’ through wires from the minus pole to the plus pole. Devices inbetween convert this energy to another form, Efficieny- e.motor=85%, combustion= 20%

To understand how this electricity works we must start with the basics. The atom is the smallest unit of matter, consisting of protons, neutrons, and electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. Electric charges that are the same repel each other and charges that are different attract each other. Electric charges can exist alone, unlike magnetic poles.

4. Increase the resistance (# green dots). What affect does this have on temperature? WHY?

A battery is a gadget that changes over synthetic vitality into electrical vitality. Every battery has two terminals, an anode (the positive end) and a cathode (the negative end). An electrical circuit keeps running between these two anodes, experiencing a synthetic called an electrolyte (which can be either fluid or strong). This unit comprising of two anodes is known as a phone (regularly called a voltaic cell or heap). Batteries are utilized to control numerous gadgets and make the sparkle that begins a gas motor.

The outer shell of electrons that orbit the nucleus of an atom is called the valance shell. This is what makes a copper atom conduct. For a copper atom the number of electrons is one. When a charge of electricity is placed in the end of a wire the electrons move into the wire. Since there is only one electron in the valance shell of a copper atom it can be easily dislodged with a small amount of energy causing it to jump to the next atom. This will then cause the valance electron of that atom to jump to the next atom and so forth. This movement happens very fast making it possible for a large number of electrons to move through the wire. An example of a conductive atom is shown figure 1.