Electricity Flashcards
Name the 8 types of energy
Light, heat, kinetic, sound, chemical, nuclear, electrical, potential
Can energy be destroyed or created
No, it can only turn into different types of energy
What is an example of energy changes
Kettle: electrical→heat
What type of charge does an electron have
Negative
What type of charge does a neutron have
Neutral
What type of charge does a proton have
Positive
What happens when two objects of the same charge interact
They repel against each other
What happens when two objects of the opposite charge interact
They attracts as opposites attract
What are examples of static electricity happening
Balloon rubbing on someone’s head
Feet rubbing against s trampoline
Trolley wheels rubbing off the floor
What is electrical current
The flow of electrons
What type of particles travel round a material for an electrical current to be produced
Electrons
What side of a battery does the electrical current move away from
The negative side
Why does the electrical current move away from the negative side of a battery
Because a negative and a negative don’t go together
What device is used to measure current
Ammeter
What is the unit of measurement for electrical current
Ampere/Amp (A)
What is voltage
The energy per electron
What device is used to measure voltage
Voltmeter
What is the unit of measurement for voltage
Volt (V)
What is a series circuit
A circuit whee thee is only one path for electrons to flow around
What is a parallel circuit
A circuit where there is more than one path for electrons to flow around
What happens to current in a series circuit
It is the same at all points
What happens to current in a parallel circuit
The total current is the values in each point added together
What happens to voltage in a series circuit
The voltage across each component adds up to the supply voltage
What happens to voltage in a parallel circuit
The voltage is the same at all points
What is resistance in a circuit
a measure of the opposition to current flow in an electrical circuit
What does resistance do to the current in a circuit
As the resistance increases, the current decreases
What is the word equation for Current
I = V over R
What is the word equation for Resistance
R = v over i
What is the word equation for voltage
V = IR
What device is used to measure resistance
Ohmmeter
What is the unit of measurement for resistance?
Ohms (omega sign)
What is an electrical conductor?
Something that lets electricity pass through it
What is an example of electrical conductors?
Any metal + graphite
What does an insulator do?
Does not let electricity pass through
What are some examples of an insulator?
Wood, rubber, glass, paper, plastic
What two things strengthen an electromagnet?
Increasing the number of coils
Increasing the voltage passing through
What does an electromagnet do?
Moves things such at doorknobs, automatic doors and computer hard drives
