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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 'C'. Can you explain this answer?
Verified Answer
Two bulbs A and B are rated 100 W, 120 V and 10 W, 120 V respectively....
Bulb A,
PA=100w
VA=120v
We know that, P=VI
So, I=P/V=100w/120v=5/6A=0.83A
Bulb B,
PB=100w
VB=120v
We know that, P=VI
So, I=P/V=10w/120v=1/12A=0.083A
Bulb A will consume more energy than bulb B when they are connected in parallel.
 
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Most Upvoted Answer
Two bulbs A and B are rated 100 W, 120 V and 10 W, 120 V respectively....
To calculate the current through each bulb, we can use Ohm's Law and the formula for power.

1. Ohm's Law: Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage across the conductor, and inversely proportional to the resistance of the conductor. Mathematically, it can be expressed as:

I = V/R

Where I is the current, V is the voltage, and R is the resistance.

2. Power formula: The power consumed by a device can be calculated using the formula:

P = IV

Where P is the power, I is the current, and V is the voltage.

Given information:
- Bulb A: Rated 100 W, 120 V
- Bulb B: Rated 10 W, 120 V
- Connected in series across a 120 V source

Since the bulbs are connected in series, the current passing through both bulbs will be the same.

Let's calculate the resistance of each bulb using the power formula:

- Bulb A: P = IV
100 W = I * 120 V
I = 100 W / 120 V
I = 0.833 A

- Bulb B: P = IV
10 W = I * 120 V
I = 10 W / 120 V
I = 0.0833 A

Since the resistances of the bulbs are different, the current passing through each bulb will be different. The bulb with higher resistance (Bulb B) will have a lower current, and the bulb with lower resistance (Bulb A) will have a higher current.

Therefore, the current through each bulb is as follows:
- Bulb A: 0.0833 A
- Bulb B: 0.0833 A

So, the correct answer is option C: 0.083 A.
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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 'C'. 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 'C'. 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 'C'. 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 'C'. Can you explain this answer?.
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