Physics Paper 1

• What topics are covered in AQA GCSE physics paper 1?

  Energy, electricity, particles, atomic structure
• What is the definition of energy in physics?

  Energy is a number indicating interactions in a system
• What is the principle of conservation of energy?

  Total energy in any interaction is conserved
• What can energy be converted into according to the study material?

  Energy can be turned into matter mass
• What are the different stores of energy mentioned?

  Kinetic, gravitational potential, elastic potential
• How is kinetic energy calculated?

  Kinetic energy is calculated with $e =$$\frac{1}{2} mv^2$
• What does gravitational potential energy depend on?

  It depends on mass, height, and gravitational field strength
• What is the formula for gravitational potential energy?

  Gravitational potential energy is $e =$$mgh$
• What does the specific heat capacity tell us?

  It tells how much energy raises 1 kg by 1°C
• What is the equation for change in thermal energy?

  Change in thermal energy is $e =$$mc\Delta T$
• What happens to particles when thermal energy increases?

  Particles move faster with increased thermal energy
• What is chemical potential energy?

  Energy stored in food or fuels
• What must happen for energy to be transferred in a system?

  Energy must be transferred between objects or stores
• What is a closed system in terms of energy?

  No energy is lost or gained from surroundings
• How does gravitational potential energy change when an object falls?

  Gravitational potential energy decreases as kinetic energy increases
• How can we find the speed of an object using gravitational potential energy?

  By equating gravitational potential energy to kinetic energy
• What is the rearranged formula for speed from kinetic energy?

  Speed is $v =$$\sqrt{\frac{2e}{m}}$
• What is the relationship between power and energy?

  Power is the rate of energy transferred
• What is the formula for power?

  Power is $P =$$\frac{E}{t}$
• How is efficiency calculated?

  Efficiency is useful energy out divided by total energy in
• What is the unit for power?

  Watts (W)
• What happens to energy in a system with low insulation?

  More energy is lost as heat to surroundings
• What are finite energy sources?

  Sources that cannot be replenished once used
• What is an example of a renewable energy source?

  Wind power or solar energy
• What is the flow of charge in electricity called?

  The flow of charge is called current
• What is the symbol for current?

  Capital I
• What does potential difference (PD) measure?

  It measures energy transferred per coulomb of charge
• What is the equation for potential difference?

  Potential difference is $V =$$\frac{E}{Q}$
• How is current calculated?

  Current is charge divided by time
• What is the unit for resistance?

  Ohms (Ω)
• What does Ohm's law state?

  Voltage equals current times resistance
• How does resistance affect current in a circuit?

  Higher resistance results in lower current
• What does a straight line on an IV graph indicate?

  A straight line indicates constant resistance
• How can we determine resistance from an IV graph?

  Resistance is voltage divided by current
• What happens to current and potential difference (PD) in a circuit?

  They are directly proportional to each other.
• What does a straight line graph of PD and current indicate?

  Constant resistance of a resistor.
• What does a steeper gradient on a PD-current graph indicate?

  Lower resistance of the resistor.
• What is the equation for resistance according to Ohm's law?

  V = I × R
• How can you find the resistance from an IV graph?

  Use R = V / I at any point.
• What does a curved graph for a bulb indicate?

  Changing resistance with varying current.