A) 75 W
B) 40 W
C) 25 W
D) 50 W
Correct Answer: C
Solution :
Resistance of electric bulb, \[R=\frac{{{V}^{2}}}{P}\] Where subscripts denote for rated parameters. \[R=\frac{{{(220)}^{2}}}{100}\] Power consumed at 110 V, \[{{P}_{consumed}}=\frac{{{V}^{2}}}{R}\] \[\therefore \] \[{{P}_{consumed}}=\frac{{{(110)}^{2}}}{{{(220)}^{2}}/100}=25W\]You need to login to perform this action.
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