Switching of a lamp in house produces noise in the radio. This is because switching operation produces

  • AArcing across separating contacts
  • BMechanical noise of high intensity
  • CBoth mechanical noise and arc between contacts
  • DNone of the above
Correct Answer : (A)

Arcing across separating contacts

Hints :

The draft velocity of the electron is


In gases, the flow of current is due to

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