D2 PBL: Electric fields
You can't see an electric field but you can visualise it by drawing lines of equipotential and field lines. Take a piece of conductivity paper and draw a point in a circle with the silver pen. Connect a battery to the line and point so that the point is positive. Use a voltmeter to plot lines of equipotential. To map field lines you can tape the voltmeter probes together and use them to find the direction in which...