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WorksheetsCapacitance 2
Total questions: 10
Worksheet time: 2hrs 40mins
Recall the definition of capacitance
Write down the equation for capacitance.
If we were to plot the graph of charge against potential difference, what would the graph look like? Will it be straight or a curve? Recall the equation of a straight line: y = mx + c
Straight line
Curve
Sketch the graph of charge against potential difference. Think which quantity should be on the y-axis and which should be on the x-axis.
Write down the formula for gradient using the quantities you have plotted on the graph.
So what can you deduce about the gradient of the charge against potential difference graph in relation to its capacitance?
The energy stored in the capacitor is equal to the area under the graph of charge against potential difference. Write down the formula for area under the graph.
Using the equation Q = CV, derive another equation for energy stored.
Using the equation, V = Q/C derive another equation for energy stored in a capacitor
State all the equations for energy stored in a capacitor.
