Question

Is the filament thickness of 60 Watt bulb is greater than 100 watts bulb filament? How does thickness effects brightness at fixed voltage?

Answer 1

Yes

This is because the electric power is directly proportional to the resistance and the resistance is inversely proportional to the diameter of the wire, so the wire with the lower diameter leads to higher power.

Hence filament of 60W bulb will thicker than filament of 100W

bulb with a thicker filament should glow brighter as more power can be dissipated due to a lower resistance (P= V^2/R).

Sice voltage is constant so if we increase the thickness i.e its diameter than lower the rasistance( R= row L/A)and hence higher the power i.e higher the energy conversion means higher the brightbess

Hope it will help you.

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