Express the Farad in S.I units

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Presentation transcript:

Express the Farad in S.I units

Spot the mistake (s)..

Which of our ways of measuring “electricity” is most closely related to energy? Current Charge Potential Difference Resistance Conductance Resistivity Capacitance

What is the equation linking energy, charge and voltage? Voltage = Energy/Charge From this we can calculate the energy transferred by the movement of charge. Energy = Charge flowing off capacitor x Ave. voltage across capacitor

From last lesson, what did the graph of Voltage - charge look like? What would be the equation that would allow us to determine energy from this graph? Energy = ½ QV V Energy Q

Use your previous knowledge and make appropriate substitutions to give 2 more versions of this equation. Energy = ½ QV But C = Q/V Energy = ½ CV2 or Energy = ½ Q2/C