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in Physics by (89.5k points)
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How many `60 W` lamps may be safely run on a `230 V` circuit fitted with a ` 5 A` fuse?
A. `2`
B. `19`
C. `20`
D. `4`

1 Answer

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Best answer
Correct Answer - B
Watt ` = "volt xx ampere"`
`rArr 60 = 230 xx I or = (6//23) A`
If `n` lamps are used in parallel , each allowing `6// 23 A` , then total current , `n xx ( 6 // 23 ) lt = 5`
or `n le 19.1 or n = 19 `

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