D3. Now remove the printer paper and examine it. Label the marked voltage points with their numerical values, and try smoothly connecting the points with the same values with lines. This gives you an equipotential diagram. D4. Now draw in some field lines. Remember, these are always perpendicular to the equipotential lines, and flow out from positive sources and into negative sources. D5. Imagine moving a positive charge around in the field you have drawn. Consider the gravitational analogue of this. Where would be the highest point on your drawing? Where would be the steepest point