AQA GCSE Physics Equations

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 links 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 power (or energy) in and useful power (or energy) out?

• Efficiency = Useful Power (or Energy) Out / Total Power (or Energy) In

• Efficiency = Useful Power (or Energy) Out x Total Power (or Energy) In

• Efficiency = Total Power (or Energy) In / Useful Power (or Energy) Out

What is the equation that links Power (P), Time (t) and Work Done (W)?

• Power = Time x Work Done, or P=tW

• Power = Time / Work Done, or P=t/W

• Power = Work Done / Time, or P=W/t

What are the units of Power?

• Watts

• Ohms

• Volts

• Coulombs

What are the units of Resistance?

• Watts

• Ohms

• Volts

• Coulombs