Electricity Flashcards
Speed triangle
Speed = distance divided by time
Distance =speed x time
Time = distance divided by speed
What are the units of speed
Km/h and m/s
Which line of a cell is positive and which one is negative
Big one positive
Small one negative
Where is an Ammeter connected
Series circuit
Where is voltmeter connected
Parallel circuit
What happens to current in a series circuit
It stays the same
What happens to current in a parallel
It splits then when the current meets again it adds back up again
What happens to voltage in a series
It splits up, the voltage will add up to the voltage of the battery
What happens to voltage in parallel
Stays the same
How do you find the resistance in a series
Add up the resistors values
R1 + R2 etc
How to find the resistance in parallel
Resistance = r1 x r2 divided by r1 + R2
What is the charge equation
Q=IT
I= current
T = time in seconds
What is the units of current
Amps
What is the units of resistance
Ohms
What is the ohms law equation
V =IR
How do you calculate moment
Force x distance
Where is the pivot in class 1
Between the load and effort
Where is the pivot in class 2
On the end closer to the load
Where is the pivot on class 3
The end closest to the effort
Units of moments
Newton meters
Newton centimetres
What is moment
A turning force
What is the moment when the pivot is balanced
Clockwise is equal to the anti-clockwise
What are atoms made up of
Protons neutrons and electrons
What happens during nuclear fission
A large nucleus such as Uranium absorbs a neutron it becomes unstable and splits into 2 smaller nuclei as well as a few neutrons
What is a chain reaction of nuclear fission
After one reaction the neutrons produced hit other nucleus and cause further fission reactions
What is nuclear fusion
The joining of 2 small nuclei such as hydrogen to form a larger nucleus such as helium
What is Einsteins equation and what does it mean
E= mc2
It means a little bit of math causes a lot of energy
What are some forms of energy resources
Oil, coal, gas, nuclear, wind, solar
What is a renewable resource
Resource which can be replaced quickly
What are non renewable resources
Resources which once used up is impossible to make more
Examples of renewable resources
Wind, solar, hydroelectric, todal
Examples of non renewable
Oil and coal and gas and uranium
What is nuclear waste
When both fusion and fission produce radioactive atoms called nuclear waste. Fission produces more
What reaction makes up nuclear bomb
Nuclear fission
What is current
The number of electrons through a wire per second
What is voltage
The amount of pressure pushing electrons through a wire
