VCR Lesson 5
Fill in the blank with the most appropriate word from Lesson 5.
To rise or float, or cause to rise, seemingly despite gravity.
Maglev trains do not have an engine. Magnets within the track as well as the underside of the train cause the train to move. The magnetized coil in the track repels the underside of the train causing it to levitate above the track. Once the train is levitating, power is sent to the coils to create magnetic fields that push and pull the train. The polarity is rapidly switched back and forth so that the coil in front pulls, while the coil behind pushes thereby creating propulsion.
Choose the letter of the sentence in which the word in the bold-faced type is used incorrectly.
b. Levitation can not only be achieved with magnets but also through the use of air pressure or a stream of air.
c. The levitation of small live animals with high water content has also been achieved through the use of very powerful electromagnets due to the diamagnetic repulsion of body water.
d. The hummingbird levitated over the flowers as it drank the nectar inside.