Switching of a lamp in house produces noise in the radio. This is because switching operation produces________?
Correct answer: A. arcs across separating contacts
- A. arcs across separating contacts
- B. mechanical noise of high intensity
- C. both mechanical noise and arc between contacts
- D. none of the above
Explanation
Opening the switch can produce an arc across the separating contacts, and the rapidly changing current generates radio-frequency interference. Mechanical contact noise is not the main cause of the radio disturbance.
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