- #1
Jahnavi
- 848
- 102
Homework Statement
Homework Equations
Power of a bulb = I2R = V2/R
The Attempt at a Solution
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From the ratings given on the bulbs using P=V2/R , we can conclude that resistances of the bulbs in decreasing order are R , P , Q i.e R has highest resistance and Q has lowest .
Now brightness is related to power dissipated .
Using P= I2R and the fact that both the current flowing in , as well as resistor of R is highest , so power dissipated in R should be highest .
Now potential difference across P and Q is same and resistance of P is more than that of Q , so using V2/R , power dissipated in P should be lower .
Hence least bright should be P . But R,P is not an option .
What is the mistake ?