Physics paper 1

• What topics are covered in AQA GCSE Physics Paper 1?

  Energy, electricity, particles, atomic structure
• What is energy described as in physics?

  Energy is an idea that predicts interactions
• How is total energy in any interaction characterized?

  Total energy is always conserved
• What is a caveat regarding energy conservation?

  Energy can turn into matter mass
• What are the different stores of energy called?

  Types of energy or energy stores
• How is energy measured?

  Energy is measured in Joules
• How do you calculate kinetic energy?

  Kinetic energy is calculated with $e =$$\frac{1}{2} mv^2$
• What happens to kinetic energy as an object's speed increases?

  Kinetic energy increases with speed
• What is the formula for gravitational potential energy?

  Gravitational potential energy is $e =$$mgh$
• What does the height in the gravitational potential energy formula represent?

  Height represents the distance above ground
• What does the change in gravitational potential energy indicate?

  It indicates energy available to lose when falling
• How is elastic potential energy calculated?

  Elastic potential energy is $e =$$\frac{1}{2} k e^2$
• What does specific heat capacity measure?

  It measures energy needed to raise temperature
• 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 transfer between objects or stores
• What is a closed system?

  No energy is lost or gained from surroundings
• How can gravitational potential energy be equated to kinetic energy?

  GPE lost equals KE gained
• What does it mean if a roller coaster has more GPE at the top than KE at the bottom?

  Energy has been lost to surroundings
• What is the equation for power?

  Power is $P =$$\frac{E}{T}$
• What is the unit for power?

  Power is measured in Watts
• How do you calculate energy used in a minute?

  Energy is $E =$$P \cdot T$
• What does efficiency measure?

  Efficiency measures useful energy used
• How is efficiency calculated?

  Efficiency is $\frac{\text{useful energy out}}{\text{total energy in}}$
• What does a 60% efficiency mean?

  40% of energy is wasted
• What are finite energy sources?

  Sources that cannot be replenished
• What is electricity defined as?

  Flow of charge or charges
• What happens to energy in a simple circuit?

  Energy is transferred from source to component
• What is the symbol for a cell in a circuit?

  The symbol is a long line and short line
• What is the role of a battery in a circuit?

  A battery stores chemical potential energy
• How does current flow in a circuit?

  Current flows from positive to negative terminal
• What is potential difference (PD)?

  PD is energy transferred per coulomb of charge
• How is potential difference measured?

  Measured with a voltmeter in parallel
• What is the equation for potential difference?

  Potential difference is $V =$$\frac{E}{Q}$
• What does current tell us in a circuit?

  Current tells us the rate of flow of charge
• What is the equation for current?

  Current is $I =$$\frac{Q}{T}$
• How is resistance defined in a circuit?

  Resistance resists the flow of charge
• What happens to current when potential difference increases?

  Current increases with higher potential difference
• What is Ohm's Law?

  V = I × R