You have two electric lamps having rating 40w; 220v and 60w;220v. Which of the two has a higher resistance? Give reason for your answer. If these lams are connected to a source of 220v, which will glow brighter?
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I they are connected in series then the formula is
R= v²/w
1st lamp R= 220×220/40
R= 1210
2nd lamp R= 220×220/60
R= 806.666
You can easily find this whose resistance is greater higher resistance means brighter glow
If they are connected in parallel series then formula is R = w²/v
Your answer will come
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