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There are two electric bulbs marked 60 W, 240 V and 40 W, 240 V respectively. Which one them has higher resitance ? Calculate. |
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Answer» er ; V = Voltage ; R = ResistanceWe know, P = V × R60 = 240 × R1 => R1 = 1/4 ohms40 = 240 × R2 => R2 = 1/6 ohmsClearly, R1 > R2 |
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