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Static Electricity
Electric fields
Circuits
Batteries/Cells
Conductors and Insulators
100
Name the 3 particles in an atom
Protons, Neutrons, Electrons
100
What charge is a 'test' charge?
Positive
100
A circuit is an example of static/current electricity
Current
100
Give an example of a dry cell.
Household batteries
100
Define the term 'Conductor'
A material that allows current to flow through it easily.
200
If an object loses electrons, what charge does it become?
Positive
200
Electric fields become stronger/weaker the further away from the charge you go.
Weaker
200
Does a switch need to be open or closed in order for a circuit to work?
Closed
200
A car battery is an example of which type of cell?
A wet cell
200
Give two examples of conductors.
Metals, Salt water
300
A Van de Graff generator generates a lot of what type of charge?
Negative
300
Which direction do we draw electric fields?
Away from positive charges, and towards negative charges.
300
What are the 3 main components of a circuit?
An energy source, A source of resistance (something to use up the electrical energy), Wires
300
Three 1.5V batteries can be joined together to provide how many volts?
4.5 volts
300
What is the name for a material that does not allow current to pass through it easily?
An insulator
400
If an object is neutral, what is the relationship between protons and electrons?
An equal number of both
400
How do scientists represent electric fields?
By drawing field lines
400
What does electric current measure?
The amount of charge (electrons) that passes around the circuit every second.
400
Give three advantages of dry cells over wet cells.
Smaller, Lighter, Portable, Don't spill if knocked over
400
Give two examples of insulators.
Rubber, Plastic, Wood, Cloth
500
When you bring a charged object close to a neutral object, you can get charges forming in the neutral object. What are these charges called?
Induced charges
500
Name one difference between electric and magnetic fields.
Magnets have poles (north and south), where as electric fields have charges (positive and negative). A magnetic field has two poles (north and south), where as an electric field can have only one charged point.
500
What units is current measured in?
Amperes/Amps
500
In a wet cell, two electrodes are placed in a bath of liquid. What type of liquid is it? Give an example.
Acid, Citric acid (like in the lemon battery)
500
What makes a material a good conductor? (think in terms of atoms and particles)
Having lots of free electrons, that are able to move from one part of the object to the other easily.