Electric Circuits
The time required for a pulse to change from 10 % to 90 % of its maximum value is known as

 run time.
 rise time.
 fall time.
 decay time.

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Electric Circuits
Atoms have no electric charge because they

 have an equal number of charged and non charged particles.
 have an equal number of neutrons and protons.
 have neutrons in their nuclei.
 have an equal number of electrons and protons.

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