Two electric bulbs A and B are marked 40 W – 220 V and 60 W – 220 V respectively. Which one of the two has a greater resistance?
We Know that
Resistance (R) = 
⇒ Resistance (RA) = 
⇒ Resistance (RB) = 
∵ 1,210 (RA) > 806.67 (RB)
∴ Electric Bulb A has the greater resistance
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