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25 Cards in this Set
- Front
- Back
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What Makes Up An Atom? |
An atom is made of protons, neutrons and electronics. |
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Neutrons |
Neutrons are found inside the nucleus of an atom and has no charge and can't move. |
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Electrons |
Electrons are found outside the nucleus of an atom. They have negtive charges and can move around. |
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Protons |
Protons have a positive charge and are found inside the nucleus. They can't move. |
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What is an electric charge |
A form of charge that exerts an electric force. Can be positive, no charge/ netural and negative |
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Three types of Charges and Why An Object Could Have That Charge |
Netural charges are objects that have an equal amount of both electrons and protons. Positive charges occur when an object has more protons than electrons. Lastly negtive charges have more electrons than protons. |
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Can Objects Change There Charges. And If So How? |
An objects overall charge can change. This happens if electrons are transferred in or out of these object. (Will be a question later on) |
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What is Static Electricity |
Static electricity is an imbalance of electrical charges on the surface of an object. |
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Can You Detect Electric Charges. If So How? |
Yes it is possible to determine an objects charge. All you need is a type of electroscope. |
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How Does A Pith Ball Electroscope Work? |
A Pith Ball Electroscope is a ball suspended from a rod. It is netural and when you bring a object close by and the ball attracts to it then your object is charged. |
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How Does A Metal Leaf Electroscope Work? |
It is much more commonly used then the pith ball one. This is because of how's it's made. If a negtive object is brought near the Electroscope you will see the 'leaves' move meaning it's negtive. If the leaves move back to position then the object has a positive charge or neutral. |
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Law Of Electric Charges |
The law is two simple rules. Like charges will repel where as unlike will attract to each other. |
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What is Electric Force |
Electric force is the force exerted by an object with a charge. Either a force of attraction or repulsion. |
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What is Induced Charge Separation |
A shift in the position of electrons in a netural object due to the charge of the other object. This is how neutral objects attract to a object with a charge. |
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Charging by Friction |
The transfer of electrons between two netural objects made of different materials when the two objects touch. The charge outcome is determined by an objects hold on electrons. |
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Electronstatic Series |
A list of materials that tell you which objects have a stronger hold on electrons. |
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Charging by Conduction |
Charging an object by contact with a charged object. Can be between a netural object and charged object or two charged objects. |
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Grounding |
Connecting an object to a large body that is capable of removing an electrical charge this object may have. |
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Conductors |
Materials that lets electrons move through it easily. Examples as we copper, gold, human body, earth and many more. |
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Insulators |
Materials that don't allow the electrons to easily move through it or not move at all through it. Examples are rubber, oil, fur and many more. |
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Charging by Induction Temporarily |
Charging a netural object by bringing another charged object close but not touching the netural object. This is only temporary as the electrons will move back to their original place one the charged object is gone. |
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Charging by Induction Permanently |
An object can be permanently charged by Induction by grounding. When you bring a negatively charged object close to an netural object the electrons will change position to best suit the charged. Which leaves a positive and negtive side. To be permanently charged though you must touch the object quickly then remove your hand. (Or any other object that can ground it) Then some electrons will move into your hand to get away from the negtively object. Leaving a permanently charged object behind. |
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Electric Discharge |
Electric Discharge is the rapid transfer of electric charges from one object to another. |
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How is Lightening Caused? |
It occurs because of the imbalance of charges between clouds or clouds and the ground. A theroy suggests that when water droplets move in clouds as they move past eachother they become charged. Electrons are transferred by riding water molecules to falling water droplets. Eventually the electrons collect in access at the bottom of the cloud. The excessive amount of electrons at the bottom of clouds repel the electrons of Earth's surface. Electrons move away from the area of Earth's surface and this causes it to become postive. The overall result is an imbalance of charge between the bottom of clouds and Earth's surface. If the imbalance is great enough the excess electrons longer at the bottom they may be rapidly transferred from cloud to the ground in Lightening form. The large transfer of electrons superheats the surrounding air. This produces the flash of light and tumbling sound. |
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Lightening Rods |
To minimize damage from Lightening, these rods are placed onto buildings. This provides a safe path for lightening to follow to the ground. This is because they are conductors and attached to the ground that grounds the Lightening. |
