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Two bulbs A and B are rated 100 W, 120 V and 10 W, 120 V respectively. They are connected across a 120 V source in series. Calculate the current through each bulb.​
  • a)
    0.08 A
  • b)
    0.0083 A
  • c)
    0.083 A
  • d)
    8 A
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Two bulbs A and B are rated 100 W, 120 V and 10 W, 120 V respectively....
In the bulb A -  
                     
                      ⇒ Volts = 120 v

                      ⇒ Power = 100 w

⇒In the bulb B-

                    ⇒ Volts = 120 v

                    ⇒ Power = 10 w


Now let us find the resistance of the two bulbs -


             ⇒ R = V^2/ P


Let us find the resistance for the bulb A-

             ⇒ Bulb A ( R ) =  120^2 / 100 =  144 ohm


             ⇒ Bulb B ( r ) =  120^2 / 10  = 1440 ohm



Now we got the resistance for both the bulbs.

To find the series combination , we need to use the below formula to find out it -


⇒ R = R₁ + R₂ =
 
      =  144 + 1440

      = 1584 ohm is the resistance in series combination.



So 10 watts bulb consume more energy because uses less power and also the amount o current flowing is less . Remember the formula -  P=I x E. 
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Two bulbs A and B are rated 100 W, 120 V and 10 W, 120 V respectively....
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Two bulbs A and B are rated 100 W, 120 V and 10 W, 120 V respectively....
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Two bulbs A and B are rated 100 W, 120 V and 10 W, 120 V respectively. They are connected across a 120 V source in series. Calculate the current through each bulb.​a)0.08 Ab)0.0083 Ac)0.083 Ad)8 ACorrect answer is option 'A'. Can you explain this answer?
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Two bulbs A and B are rated 100 W, 120 V and 10 W, 120 V respectively. They are connected across a 120 V source in series. Calculate the current through each bulb.​a)0.08 Ab)0.0083 Ac)0.083 Ad)8 ACorrect answer is option 'A'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Two bulbs A and B are rated 100 W, 120 V and 10 W, 120 V respectively. They are connected across a 120 V source in series. Calculate the current through each bulb.​a)0.08 Ab)0.0083 Ac)0.083 Ad)8 ACorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two bulbs A and B are rated 100 W, 120 V and 10 W, 120 V respectively. They are connected across a 120 V source in series. Calculate the current through each bulb.​a)0.08 Ab)0.0083 Ac)0.083 Ad)8 ACorrect answer is option 'A'. Can you explain this answer?.
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