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Incandescent bulbs are designed by keepi...

Incandescent bulbs are designed by keeping in mind that the resistance of their filament increases with the increase in temperature. If at room temperature, 100W, 60W, and 40W bulbs have filament resistances `R_(100), R_(60), and R_(40)` , respectively. the relation between these resistance is

A

`1/R_(100)=1/R_(40)+1/R_(60`

B

`R_(100)=R_(40)+R_(60)`

C

`R_(100)gtR_(60)gtR_(40)`

D

`1/R_(100)gt1/R_(60)gt1/R_(40)`

Text Solution

Verified by Experts

The correct Answer is:
D
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