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QAIPMT-2004-Ph-2636: NEET 2004 Physics - Class 12 AIPMT-2004-Ph-2636 Solution: When three identical bulbs of 60 watt, 200 volt rating are…
When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be
Multiple Choice Options
- A 60 watt
- B 180 watt
- C 10 watt
- D 20 watt
Step-by-Step Verified Solution
The resistance of each bulb
= V 2 P = ( 200 ) 2 60 �
When three bulbs are connected in series their resultant resistance
= 3 _ ( 200 ) 2 60
Thus power drawn by bulb when connected across 200 V supply
P = V 2 R r e = ( 200 ) 2 3 _ ( 200 ) 2 / 60 = 20 W