question_answer

  A circuit has a fuse of 5 A. What is the maximum number of 100 W (220 V) bulbs which can be safely used in the circuit?

Answer:

                  Suppose x number of such bulbs can be used. Power of one bulb = 100 W Power ofx bulbs (P) = 100x W                     Potential difference (V) = 220 V We know that      P = VI                                  (1)