In a certain region an electric potential V is present. An unknown charge Q is moved around this region between points at potential difference ΔV. A physicist measures the change in the potential energy ΔU as the charge is moved. The table below shows the data of the measurements. The unit for ΔV are MV (mega-Volts), the units for ΔU are kJ (kilo-joules). *See the picture for the data table You want to find the value of the unknown charge Q in mC. Since ΔU = QΔV make the plot y=mx where y=ΔU and x=ΔV. From the slope of the plot, calculate Q in millicoulombs (mC).

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.