A light bulb is rated 100W for a 220V supply. The resistance of the bulb and the peak voltage of the source respectively are

Question

A light bulb is rated 100W for a 220V supply. The resistance of the bulb and the peak voltage of the source respectively are

A light bulb is rated 100W for a 220V supply. The resistance of the bulb and the peak voltage of the source respectively are
A. `242Omega` and 311 V
B. `484Omega` and `311V`
C. `484Omega` and 440V
D. `242Omega` and `440V`

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Resistance of a bulb`=(("Rated voltage")^(2))/("Rated power")`
`=((220)^(2))/(100)=484Omega`
Peak voltage of the source.
`V_(0)=220sqrt(2)V=311V`

5 views Answered 2023-02-05 15:29