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P.S. SG 2

QuestionAnswer
Describe the parts of an atom. Where are they located? What are their charges? Protons- positive charge; located in the center/nucleus Neutrons- neutral charge; located in the center/nucleus Electrons- negative charge; located on the outermost part
Describe the difference between a material that is a good conductor of electricity and a material that is an insulator. A good conductor of electricity allows the electrons to move freely, while an insulator bounds electrons, prevent them from moving freely.
Changes in an object's motion are caused by... An unbalanced force.
Name three household items that use a battery as a source of electric current. -Remote Controllers -Flashlights -Laptops
Positive charges _______ one another. Repel
The electric force between two objects ________ when the distance between them decreases. Increases
Which particle is a negatively charged particle? Electron
Electric field lines show the strength and _______ of an electric field. Direction
What is the SI unit of electric charges? Coulombs.
Define an electric force. The force of attraction or repulsion between objects due to charge.
Define an electric charge. An electrical property of matter that creates electric and magnetic forces and interactions.
An electric cell is a source of electric current because of a ________ between the terminals. Potential difference
A(n) )________ is a solution that conducts electricity. Electrolyte
The rate at which charges move through a conductor is called... Current.
________ is the opposition posed by a material to the flow of current. Resistance
Current is produced when charges are accelerated by an electric field to move to a position of lower... Potential energy.
What is the formula for currents? I=V/R
Which of the following has the lowest resistance? a. semiconductor b. superconductor c. conductor d. insulator b. superconductor
In most cases, increasing the temperature of an object will________ its resistance. Increase
Individual components in a parallel circuits experience the same.... Voltage.
A circuit breaker acts as a switch creating a(n) ________ circuit when current is too high. Open
Define a series circuit. A circuit in which the components form a single path.
Define a parallel circuit. A circuit in which two or more paths are connected to the voltage source.
Define a fuse. A device that contains a metal strip that melts when a certain current is exceeded.
Define a switch. A device used to open or close an electric circuit.
There is a repulsive force between two charged objects when... Their charges are of like sign.
Electric force varies depending on the.... Charge and distance between charged objects.
Batteries typically have ____________ terminal. One positive and one negative
An electric current is produced when charges are accelerated by an electric field to move to a position of potential energy that is... Lower.
Resistance is caused by... Internal friction.
The SI unit of resistance is the... Ohm.
What is electric potential energy? The ability to move an electric charge from one point to another. Measured in Joules (J).
What is potential difference? The voltage difference in potential between two points in a circuit. The unit is a volt. (1 J/1C)
What is a coulomb? The measurement for electric charge (C).
What is a battery? A device that produces an electric current by converting chemical or radiant energy into electrical energy.
What is an electric current? The rate at which charges pass through a given point (Represented as I).
What is an ampere? Electric currents are measured by ampere, or amp (A).
What is resistance? The opposition presented to the current by a material or device (R)
What is resistance impacted by? -Temperature. -Length of wire. -Thickness of wire.
What is an electric force? Forces caused by changed objects. Amount of force depends on charge and distance.
What is an electric field? The area of force surrounding a charge.
What is the Law of Conservation of Charge? States that the total charge remains constant.
What is friction? Charge transferred caused by rubbing 2 objects together resulting in charge inbalance.
What is contact? A transfer of charges from an unbalanced object to a neutral object by contact.
What is induction? A charged object is brought near but not touched to a neutral conducting object. The presence of a charged object near a neutral conductor will force electrons within the conductor to move.
What is an electrical circuit? A set of electrical componenets such that they provide one or more complete paths for the movement of charges (ex. switches, light, batteries).
What diagram shows electric circuits? Schematic.
List some examples of conductors and insulators. Conductors- most metals such as copper, silver, gold, and saltwater. Insulators- non-metallic materials such as rubber, plastic, and wood.
Created by: OliviaRoark
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