The AC voltage is such that heavy masses do not react to the changing polarity fast enough, effectively only feeling the base DC and hence slowly drifting to the conductor that was originally negatively charged and eventually annihilating.
To use van Fraassen's example, consider "Why is this conductor warped?" Depending on the context, the intended contrast might have to with, e.g., why this particular conductor is warped in contrast to some other conductor that is unwarped or alternatively, it might have to do with why this particular conductor is warped now when it was previously unwarped.
A change in the strength of a magnetic field will cause a current to flow in a conductor that happens to be around.
I hurried down the aisle jiggling the keys and calling to the conductor that we suspected these keys belonged to the gentlemen who had just left the train.
Fortunately, Roger Norrington filled the breach by leading the Scottish Chamber Orchestra, fortified with period horns and trombones, in a performance dedicated to the late conductor that respected period-instrument incisiveness yet also achieved spaciousness and grandeur.
After a failed suicide attempt, the peasant boards a train for St . Petersburgand matter-of-factly confesses to the conductor that he had murdered his brother.
Always remember to move the trocar away from the expected ablation zone in order to avoid having a conductor that will transmit heat from the lesion to the surface, with resultant skin and soft tissues burns.
Metal and acrylic designs are applied directly to the surface of the skin, from a 'blinker' worn on the bridge of the nose (generating electricity from every blink) and a 'blood bridge' for the forearm, to an e-pulse conductor that cultivates the pulse (sent from a neurological system on the wearer's back).
The power travels to the antenna through the same conductor that carries GPS signals to a receiver.
Electroscope, instrument for detecting the presence of an electric charge or of ionizing radiation, usually consisting of a pair of thin gold leaves suspended from an electrical conductor that leads to the outside of an insulating container.
