12th Class Physics Sample Paper Physics Sample Paper-12

  • question_answer
    Some students of \[XI{{I}^{th}}\] class went to visit a science exhibition. They saw the process of electroplating. The students exhibited to see electroplating with the help of DC source. Immediately students raised the doubt, the teacher incharge explained and cleared their doubts.
    (i) What values were displayed by the students?
    (ii) Why should we use DC instead of AC?

    Answer:

    (i) Curiosity, critical thinking and understanding.
    (ii) We prefer AC, because in AC, direction of current changes periodically, whereas the DC has fixed polarity.


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