Which has a higher resistance: a 50W -220V lamp or a 25W -220V lamp ? Calculate the ratio of the resistances.

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asked Jan 22, 2018 in Physics by Kundan kumar (49,132 points) 34 435 1345

Which has a higher resistance: a 50W -220V lamp or a 25W -220V lamp ? Calculate the ratio of the resistances.

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answered Jan 22, 2018 by Vikash Kumar (144,729 points) 8 11 26
selected Jan 23, 2018 by Kundan kumar
 
Best answer

Under a constant (fixed) applied voltage (V),

R2>R1, 25W bulb has higher resistance. Resistance of 25 W lamp bulb is twice the resistance of 50W lamp bulb.

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