To explain:
The bulb, that will draw more current and the one which will have a higher resistance.
Answer to Problem 10Q
Solution:
The 100W bulb draws more current but the 75W bulb has more resistance.
Explanation of Solution
Formula used: The Ohm’s law tells that the ratio of voltage drop ( V ) and the current ( I ) passing through a resistance ( R ) is ideally constant which is equal to the value of that resistance itself, i.e.,
The power consumption by a resistor is given as,
We are assuming that both the bulbs are being used in the same country, i.e., the voltage supply to both the bulbs isthe same.
Now to determine which bulb draws more current, we can use the formula
Similarly, to determine which bulb offers more resistance, we can use the formula
Conclusion:
The higher the power consumption,the more will be the current drawn, and the lower the power consumption, the higher will be the resistance of the filament of the bulb.
Chapter 18 Solutions
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