question_answer

  In a hot summer afternoon a man was shouting through a megaphone. He was zip-repairer. As Vidhi was preparing for her examination, she got disturbed. She inquired her father about the instrument being used by the 'zip-repairer'. The father told her that it was a megaphone also known as loud hailef. Read the above passage and answer the following questions (a) State the principle on which the megaphone works. (b) Why megaphones should not be used in residential areas? (c) Which value is shown by Vidhi when she inquired about the instrument?

Answer:

          (a) Megaphone works on the principle of multiple reflection of sound.                        (b) Megaphones should not be used in residential areas to avoid noise pollution.                      (c) Vidhi shows her curiosity to learn about the things of her surroundings.