AQA GCSE Physics Equations - Energy and Electricity

What is the equation that links gravitational field strength (g), mass (m) and weight (W)?

• Weight = Mass x Gravitational Field Strength, or W=mg

• Weight = Mass / Gravitational Field Strength, or W=m/g

• Weight = Gravitational Field Strength / Mass, or W=g/m

What is the equation that links kinetic energy (E_k), mass (m) and velocity (v)?

• Kinetic Energy = 0.5 x Mass x Velocity², or E_k=0.5 x m x v²

• Kinetic Energy = 0.5 x Mass² x Velocity, or E_k=0.5 x m² x v

• Kinetic Energy = 0.5 x Mass² / Velocity, or E_k=0.5 x m² / v

What is the equation that links gravitational field strength (g), gravitational potential energy (E_g), height (h), and mass (m)?

• Gravitational Potential Energy = Mass x Gravitational Field Strength x Height, or E_g=mgh

• Gravitational Potential Energy = Mass / (Gravitational Field Strength x Height), or E_g=m/(gh)

• Gravitational Potential Energy = Mass x Gravitational Field Strength / Height, or E_g=mg/h

What is the equation that links energy transferred (E), power (P) and time (t)?

• Power = Energy Transferred / Time, or P=E/t

• Power = Time / Energy Transferred, or P=t/E

• Power = Energy Transferred x Time, or P=Et

What is the equation that links charge (Q), current (I) and time (t)?

• Charge = Current x Time, or Q=It

• Charge = Current / Time, or Q=I/t

• Charge = Time / Current, or Q=t/I

What is the equation that links current (I), potential difference (V) and power (P)?

• Power = Potential Difference x Current, or P=VI

• Power = Potential Difference / Current, or P=V/I

• Power = Current / Potential Difference, or P=I/V

What is the equation that links current (I), power (P) and resistance (R)?

• Power = Current² x Resistance, or P=I²R

• Power = Resistance² x Current, or P=R²I

• Power = Resistance² / Current, or P=R²/I

What is the equation that link charge (Q), energy transferred (E) and potential difference (V)?

• Energy Transferred = Charge / Potential Difference, or E=Q/V

• Energy Transferred = Potential Difference / Charge, or E=V/Q

• Energy Transferred = Charge x Potential Difference, or E=QV

What is the equation that links current (I), potential difference (P) and resistance (R)?

• Potential difference = Current x Resistance, or V=IR

• Potential difference = Current / Resistance, or V=I/R

• Potential difference = Resistance / Current, or V=R/I

What is the equation that links efficiency, total energy in and useful energy out?

• Efficiency = Useful Energy Out / Total Energy In

• Efficiency = Useful Energy Out x Total Energy In

• Efficiency = Total Energy In / Useful Energy Out