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P-Type Substance:
When a small quantity of boron or Indium (group III A elements ) is added to silicon or Germanium, holes are formed in it and it becomes good conductor of positive charges. Such a substance is called as P-type substances.
An unknown tuning fork is sounded along w/ a tuning fork whose frequency is 256Hz and a beat frequency of 3 Hz is heard. What i the frequency of the unknown tuning fork?
what is the physics principle involved in the lens maker equation
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