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Combination of Bulbs (or Electrical Appliances)

Bulbs (heater, etc.) are in series
  • Total power consumed:
77212.png
 
76505.png
Fig. 15
  • If n bulbs are in series, Ptotal = P/n
  • 76547.png
     
    i.e., in series combination, bulb of lesser wattage will give more bright light and PD appeared across it will be more.
Bulbs (heater, etc.) are in parallel
  • Total power consumed:
77218.png
 
76519.png
Fig. 16
  • If n identical bulbs are in parallel, Ptotal = nP
  • 76563.png
     
    i.e., in parallel combination, bulb of greater wattage will give more bright light and more current will pass through it.




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