12th Class Physics Sample Paper Physics Sample Paper-10

  • question_answer
    A boy, while crossing the road, saw an on overhead street light in the day time. Thinking it to be wastage of current and power, he switched OFF of the street light over when it was at some height on the pole and it was not easy for him to switch off.
    (i) What words would you frame for the little boy and his thinking?
    (ii) What is the basic working principle of a transformer?


    (i) The boy was having the sense of nationality as he considered himself as a responsible citizen of the country and did a tough task for saving the electricity. His action and sense of belongingness in favour of all proved him to be a member of the family who loves its nation.
    (ii) Working of a transformer is based upon Faraday's law of electromagnetic induction as mutual induction between two or more winding is responsible for transformation action.

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