question_answer

  In an electrical circuit, three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Write the order of brightness.

Answer:

                  Bulbs are rated presuming that they all are to be connected with the same voltage supply (say 230 V in India). In parallel combination, voltage remains same, so greater the watt, greater the brightness. Therefore, brightness (B) of three bulbs are as follows                                    (1+1)