It is a current that can induced in a semiconductor materail by colling them in a magnetic field below a transition temperature and then switched off the field...thank u N.S
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Persistent Organic Pollutants are chemicals that are insoluble in water, don't biodegrade, and tend to persist in the environment. Pops may be residual residue of other chemicals, used in factory's or as pesticides. The 12 most "notorious" have been banned by the UN.
It's alternating current
The base current of the emitter current is smaller.
Direct current, as opposed to alternating current.
Alternating current is better than direct current for transmission.