question_answer

  A boy was making a model of electric bell. He connected the coil in the circuit and switched it on. However, the magnetism produced in the coil was not strong enough. Then, he made some changes in the coil now and the circuit was now working properly. He also found out other ways on producing a strong magnetism.              Read the above passage and answer the following questions (a) What changes did the boy make in the coil? (b) What values of the boy would you appreciate? (c) Which other ways did he discover for increasing the strength of magnet?

Answer:

                  (a) The boy increased the number of turns in the coil and placed a soft iron core (i.e., decreased air gap in the coil).                        (1) (b) Boy   is   an   observant,   experimental, inquisitive, scientifically tempered and practical.                                                            (1) (c) Increasing the magnitude of current passing through the coil.                                (1)