Examlex
Which of the following on a highway tractor I- or C-channel frame rail is vertical?
Magnetic Fields
Invisible fields that exert force on particles that are magnetic in nature or moving electric charges.
Electrical Activity
The movement of electrically charged particles, such as electrons, which is fundamental to the operation of various biological systems and electronic devices.
EEG
Electroencephalography, a method to record electrical activity of the brain using electrodes placed on the scalp.
MEG
Magnetoencephalography, a neuroimaging technique for mapping brain activity by recording magnetic fields produced by electrical currents in the brain.
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