question_answer

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

Answer:

                  Suppose number of such bulbs can be used. Power of one bulb   = 100 watt Power of  bulbs (P) = 100 watts Potential difference (V) = 220 volts            =5 ampere We know                              P = VI           100= 220x5                            =11bulbd