Q. Static electricity is used in pollution control by applying a static charge to dirt particles in the air and then collecting those charged particles on a plate or collector of the __ electrical charge.

A
same
B
opposite
C
Static
D
None of these
Solution:
  • Static electricity is used in pollution control by applying a static charge to dirt particles in the air.
  • Then collecting those charged particles on a plate or collector of the opposite electrical charge.
  • Therefore the correct option is B.
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