To change from a one to a zero, the microprocessor sends electrical currents to change the polarity of the top layer.

FORBES: Total Recall

Reality extends to the plain fact that there is no switch or level to push, pull or toggle that will instantaneously change the polarity of the flow.

FORBES: How to Steer Your Finances Through the Recession

To change the bit from a one to a zero to write or store new data the microprocessor sends electrical currents through the chip to change the polarity of the top layer.

FORBES: Total Recall