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Electricity Test
Last one! Summer here we come.
| Term | Definition |
|---|---|
| True or False: If you get a shock when you touch a metal doorknob, static discharge has occurred. | True |
| True or False: All electric charge is based on the protons and electrons in atoms | True |
| True or False: Positive and negative particles always repel each other. | False |
| True or False: Charged particles must be in contact in order to exert electric force over each other. | False |
| True or False: When charged particles exert force on each other, their electric fields interact. | True |
| True or False: When electrons move from one object to another, the total charge remains the same. | True |
| True or False: Rubber attracts electrons less strongly than wool does. | False |
| True or False: Electrons can be transferred between objects only when the objects are touching. | False |
| True or False: Electric charges cannot travel easily through the air, especially if the air is dry. | True |
| True or False: During a thunderstorm, negative charges become concentrated at the tops of clouds. | False |
| Moving electric charges creates: electric current, lightning bolts, two of these are correct, friction | Two of these are correct |
| Electric field lines around a negatively charged particle: | Point towards the particle |
| The strength of electric force is determined by the Two of these are correct, distance between charged particles, amount of electric charge, conservation of electric charge | Two of these are correct |
| The formation of charged matter depends on the: | Transfer of electrons |
| Ways that charges can be transferred include: | Conduction, Polarization, Friction |
| If you rub a balloon on your hair, the balloon and hair attract each other because: | Electrons are transferred from the hair to the balloon |
| A buildup of electric charges on an object occurs because of: | Static electricity |
| Buildup of electric charges on an object: | Static electricity |
| Transfer of electrons within an object | Static discharge |
| Force of attraction or repulsion between charged particles | Electric force |
| Transfer of electrons through direct contact between objects | Conduction |
| Space around a charged particle where the particle exerts electric force | Electric field |
| Physical property that causes particles to attract or repel each other without touching | Polarization |
| Sudden flow of electrons from an object that has a buildup of charges | Electric charge |
| Objects become charged when they transfer __________. | Electrons |
| Particles with opposite charges __________ each other. | Attract |
| Particles with the same charge ___________ each other | Repel |
| When atoms give up electrons they become positively charged ions called _________. | Cations |
| When atoms gain electrons, they become negatively charged ions called _________. | Anions |
| A van de Graaff generator transfers electrons to a person touching it by the process of ___________. | Conduction |
| What subatomic particles would you find in the nucleus of an atom? | Neutrons and Protons |
| Electric charges that are different _______ each other. | Attract |
| What charge does a proton have? | Positive |
| If a substance has a higher number of electrons than protons on its surface, what type of charge does it have? | Negative |
| All matter is made up of... | Atoms |
| What is an electric shock? | It' s a phenomena that occurs when a person comes into contact with an electrical energy source. Electrical energy flows through a portion of the body causing a shock. |
| Electric current is... | ... A group of electrons in motion going through a conductor |
| True or false: Conductors are materials that allow electric current to pass through them. A good example are metals. | True. Specially silver or copper |
| Insulators are materials that do not allow electric current to pass through them. Like... | Plastics, wood, ceramics |
| Which material do we usually use for making electric cables? | Metal is used for the inner part while plastic is commonly used for the outer one |
| Why are light switches commonly made up of plastic? | To avoid getting an electric shock when using them since plastic is an insulator |
| Which is an example of a conductor? copper, porcelain, silicon, rubber | Copper |
| If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that... | Protons have moved to the rod. |
| A region around a charged particle that can exert a force on another charged particle is called an electric: | Field |
| Charging by ____ occurs when electrons are transferred from one object to another by direct contact. | Conduction |
| The buildup of electric charges is called . . . | Static electricity |
| Static electricity can "jump" from the charged object to another object, causing . . . | Electric discharge (and a shock!) |
| When negative charges on a cloud cause positive charges to build up on the ground, what may happen? | Lightning |
| What is the purpose of a lightning rod? | To send electric charges from lightning into the ground |
| Is voltage Potential or Kenetic electric energy: | Potential |
| Is current Potential or Kenetic electric energy: | Kenetic |
| What is the unit for current? | Ampere |
| What is the unit for resistance? | Ohms |
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