What instrument can be used to detect the presence of electric charge?
An electroscope.
100
What is the difference between static electricity and current electricity?
Static electricity is when electrons gather up on the surface of an object, but current electricity is when electrons flow steadily in one direction.
100
What is the difference between parallel and series circuits?
Parallel circuits have a split where the electrons can travel through different paths, in a series circuit there is only one path for the electrons to go through.
100
What is an electric charge?
Electric charge is a form of charge, either positive or negative, that exerts an electric force.
100
Fill in the blanks.
A laser printer consists of properties of both ______ and ________.
Conductors, Insulators
200
What does the Law of Electric Charges state?
1. Objects with like charges repel.
2. Objects that have opposite charges attract.
200
What does the term "battery" refer to?
The term "battery" refers to 2 or more cells combined.
200
What are the four factors that affect resistance?
Type of Material
Diameter
Length
Temperature
200
What is charging by induction?
Charging by induction is charging a neutral object by bringing another charged object close to, but not touching, the neutral object.
200
What does a simple electric circuit include?
1. An energy source
2. A load
3. Conducting wires
4. A switch (sometimes)
300
What are the two methods of charging by contact?
1. Charging by Friction
2. Charging by Conduction
300
What type of current electricity moves in various direction?
AC(Alternating Current)
300
What is Ohm's law state?
Ohm's law states that as potential difference across a load increases, so does the current.
300
What is an electric cell?
It is a device that converts chemical energy into electrical energy.
300
What is an atom with an electric charge called?
An ion.
400
Which of the following will act as a better insulator?
A. Graphite
B. Silicon
C. Tungsten
C. Tungsten
400
Give an example of an renewable resource.
Ex.
Solar energy
Wind/ Wave energy
Biomass
Etc.
400
If a load has 1.2A of current flowing through it and the voltage of the load is 6.0, what is the resistance?
5.0Ω
400
What is efficiency when referring to electrical power?
Efficiency is the comparison of the energy output of a device with the energy supplied.
400
What is a photovoltaic cell?
It is a device that converts light energy from any light source directly into electrical energy.
500
Define grounding.
Grounding is the process of connecting an object to a large body that is capable of effectively removing an electric charge that the object might have.
500
What is electrical power and what is the unit for it?
Electrical power is the rate at which electrical energy is produced/consumed in a given time.
The unit for it is Watts(W).
500
The total resistance in a parallel circuit is 6Ω, the potential difference of the battery is 126V. There are 3 lamps. What is the current through each lamp?
A: 7A
500
What is an ammeter?
It is a device used to measure electric current.
500
What is the electrostatic series?
The electrostatic series is a list of materials arranged in order of their tendency to gain electrons.