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Two bulbs are having the ratings as \(60\ W\), \(220\ V\) and \(40\ W\), \(220\ V\) respectively. Which one has a greater resistance?
Electric power is given by the formula,
Electric power is given by the formula,
For the same value of \(V\), is inversely proportional to .
Therefore, . Hence, the bulb with rating has a greater resistance.
2. Calculate the resistance of a 100 \(W\) electric bulb having a voltage of 200 \(V\) in an electric circuit.
[Note: Enter the answer as a whole number.]
The formula of power is
To calculate the current, the formula is
The current flowing through an electric bulb is \(A\).
Now, the value of resistance can be easily calculated using its formula.
Thus, the resistance flowing through an 100 \(W\) electric bulb with 200 \(V\) in an electric circuit is .
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