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P.S. Chapter 10
Chapter 10 Physical Science Vocabulary
| Question | Answer |
|---|---|
| Unit for resistance | ohms |
| unit for current | amps |
| unit for power | watts |
| What law states that like charges repel and unlike charges attract | Law of Charges |
| What is located in the nucleus of an atom | protons and neutrons |
| What orbits nucleus of an atom | electrons |
| An electron has a ___ charge? | negative |
| A proton has a ___ charge? | positive |
| The outermost electrons are called ___ electrons. | valence |
| Normally objects have an __ number of protons and electrons. | equal |
| Electrons can be removed through ___. | friction |
| If an object ____ electrons it will have a negative charge. | gains |
| If an object ____ electrons it will have a positive charge. | loses |
| Net charge is measured in ___. | Coulombs |
| The charge carried by 6.24 * 10^18 protons or electrons is called a _____. | coulomb |
| Electrical ____ like metals do not easily store charges. | conductors |
| Electrostatic force is a ____ force. | field |
| In diagrams field strength is represented by the ____ between the lines of force. | distance |
| The closer the lines of force in a diagram the ___ the force. | stronger |
| The creation of a charged region on a neutral object when exposed to a nearby electrical charge is called ___. | electrical induction |
| Charges can be detected with an instrument called an ___. | electroscope |
| ___ ____ offer little resistance to electron motion. | electrical conductors |
| ___ ___ do not allow electrons to move easily. | electrical insulators |
| ____ allow limited electron flow or conduct only under certain conditions. | semiconductors |
| _____ help balance out a charge difference when one object transfers electrons to another. | discharges |
| An old device invented to store charges. It has a metal coating on the inside and outside of the jar with glass between it. | Leyden Jar |
| Electrical charges are ___ ____ because an object has only a limited number of excess electrons. | short lived |
| Electricity that involves continuously moving charges is called ___. | electrical current |
| Electrons flow from a point of ___ electrical potential energy in a conductor to a lower potential. | higher |
| Conventional current of positive charges is in the ___ direction from the electron flow. | opposite |
| If electrons are flowing from left to right ____ ____ flows from right to left. | conventional current |
| Electrons flow from the negative end to the __ end. | positive |
| ___ current is current that flows in one direction. | direct |
| An ___ ___ is a complete path from a source of electrons through a conductor and back to an electron sink. | electric current |
| An ___ ___ converts electricity to some other form of energy. | electrical load |
| A ___ allows you to open and close the circuit by opening or closing a gap in the current path. | switch |
| Electrons are tiny bits of ___. | matter |
| Electrons can be supplied by a ____ ____. | chemical reaction |
| When the chemical reactions in a battery can no longer occur the battery is ___. | dead |
| Batteries that use solid or paste-like chemicals are called ____ ___. | dry cells |
| Batteries that use metals and acidic liquid solutions are called ___ ___. | wet cells |
| Wet cells can be _____. | recharged |
| Recharging wet cells requires ____ the reactions in the cells. | reversing |
| ____ are machines that use energy to move electrons through conductors. | generators |
| Generators are basically coils of wire rotated in a magnetic field by some form of ___ ____. | prime mover |
| An example of a prime mover is a | turbine powered by steam |
| The advantage of a generator is that the charges can be used ____. | again |
| A ____ ___ uses light to give enough energy to an electron to allow it to jump from its atom to do work. | photovoltaic cell |
| The measure of potential difference is called | voltage |
| 1 ____ = 1 joule/ 1 coulomb | volt |
| Batteries are rated by the __ __ between their positive and negative connections or poles. | potential differences |
| The voltage determines the ____ the battery supplies. | energy |
| 1C/1s | 1A |
| A ____ can change the voltage within portions of a circuit. | resistor |
| Because all electrical devices have some resistance, charges always __ __ as they pass through a circuit. | lose energy |
| Direct current is ___ proportional to voltage. | directly |
| Direct current is ___ proportional to resistance. | inversely |
| Power measures how ___ work is done. | fast |
Created by:
kdcribb
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