AQA GCSE PHYSICS PAPER ONE QUICK FIRE QUESTIONS

What is the voltage of mains electricity in the UK?

230V

What is the frequency of mains electricity in the UK?

50Hz

What is the difference between alternating and direct current?

Direct goes in one directing whereas alternating goes back and fourth and different directions

What are the three wires inside a plug?

Live, neutral and earth

What are the safety features of a plug?

Covered in plastic and a fuse

What is the equation linking power, current and potential difference?

P = V x I

What are the units for power?

W

What is the equation linking power, current and resistance?

P = I^2 x R

What is the equation linking energy, power and time?

E = P X t

What is the equation linking energy, charge and potential difference?

E = Q x V

What is the National Grid?

A network of cables that send electricity around the UK

What does a step up transformer do?

Increase the voltage so can carry more efficienctly

What does a step down transformer do?

Decrease the voltage so safe and can use in homes

Particles in a solid

Particles in a liquid

Particles in a gas

Define density

Is how much mass of particles are in a set volume

What is the equation linking density, mass and volume?

Density = mass / volume

What are the units for density?

Kg/m^3

What are the units for volume?

m^3

What is specific latent heat?

The energy taken out or given in when things change state

What is the equation linking energy change. mass, specific heat capacity and change in temperature?

△E=m x c x△O

What are the units for energy change?

J

What's the units for specific heat capacity?

J/Kg 'C

What are the units for temperature change?

'C

What is the equation linking energy, mass and specific latent heat?

E = m x L

What are the units for specific latent heat?

J/kg

How big is an atom?

10 ^-10 m

What is the mass of a proton?

1

What is the mass of a neutron?

1

What is the mass of an electron?

0 or 1/2000

What is the charge of a proton?

+1

What is the charge of an electron?

-1

What is the charge of a neutron?

0

Where are protons found?

In the nucleus

Where are neutrons found?

In the nucleus

Where are electrons found?

In the outer shells

What happens to electrons when they're absorbed or emit radiation?

They can move between shells

What is the atomic number?

Smaller number of the two

What is the mass number?

Bigger number of the two

How do you find out the number of protons an atom has?

The same as the atomic number

How do you find the number of electrons an atom has?

Same as the atomic number

How do you find the number of neutrons an atom has?

Mass number - atomic number

Why do atoms have no overall charge?

The positive charge from the protons = the negative charge from the electrons

How do ions get charged?

When they gain or loose electrons

What is an isotope?

Same amount of protons but different amount of neutrons

What was the plum-pudding model?

A big blob with randomly distributed positive and negative charges

What did Rutherford do?

Disproved the plum pudding the model, and became to discover the nuclear model of the atom

What did Bohr do?

Actual person who came up with the nuclear model

What did Chadwick do?

Discovered neutrons

What is radioactive decay?

Where an atom will loose alpha/beta/gamma radiation on a completely random basis

What are the units for radioactivity?

Bq (Becquerels)

What are the three types of radiation?

Alpha, beta and gamma

What is half-life?

The time it takes for half of the radioactivity held within a substance to decay

What's absolute zero?

The theoretical temperature at which atoms stop vibrating

What is acceleration?

Rate of change in velocity. If a body increases its speed then it's said to have positive acceleration

What does an ammeter do?

Measure the current

What's amplitude?

The maximum displacement that an oscillation or wave has from its rest position

What's a battery?

A group of electrical cells connected in a series to provide an energy source for a circuit

What's a circuit?

An electrical circuit consists of an energy source connected by conductors to electrical components

What's displacement?

Distance moved in a particular direction

What's friction?

A resisting force between two surfaces rubbing against each other

What's an insulator?

A medium through which an electrical current will not flow

What's a conductor?

A medium through which an electrical current will flow

What's Ohm's law

volts = amps x ohms

What's power?

The amount of energy transferred per second

What's resistance?

The extent to which a conductor hinders the flow of an electric current

What does a resistor do?

It's a circuit component designed to reduce current

What's a series circuit?

A circuit where the components share the current flowing around the circuit

What's the equation for speed?

speed = distance / time

What's velocity?

Speed in a stated direction

What does a volt meter do?

Measures electromotive force or potential difference

What's work done?

When a force makes something move

What's the equation for work done?

work done = force x displacement

What are the different types of energy?

Gravitational, electric, elastic potential, kinetic, sound, light, nuclear, chemical and heat

What energy changes happen in a lightbulb?

Electrical energy going in, light energy coming out (useful) and also heat and sound energy coming out (not useful)

What energy changes happen in TV?

Electrical energy going in, heat will come out (wasted energy) and light and sound energy also coming out (useful energy)

What is the law of conversation of energy?

Energy cannot be destroyed or created

What is the equation linking kinetic energy, mass and velocity?

Ek = 1/2mv^2

What're the units for velocity?

m/s

What are the units for mass?

kg

What are the units for kinetic energy?

J

What is elastic potential energy?

Potential to stretch

What is the equation linking elastic potential energy, the spring constant and extension?

Ee = 1/2ke^2

What are the units for elastic potential energy?

J

What are units for the spring constant?

n/m

What are the units for extension?

M

What is gravitational potential energy?

Falling energy or energy that something has when it's about to fall

What is the equation linking gravitational potential energy, mass, gravity and height?

Ep=mgh

What are the units for gravitational potential energy?

J

What is the value and the units for gravity?

9.8 N/Kg

What are the units for height?

M

What does this symbol mean △?

Delta meaning change

What is specific heat capacity?

How much heat something can hold or absorb

What is the equation linking changing energy, mass, specific heat capacity and changing temperature?

△E=mc△O

What are the units for energy?

J

What are the units for specific heat capacity?

J/kg 'C

What are the units for changing temperature?

'C

What is the equation linking power, energy and time?

p= e/t

What are the units of power?

W (watts)