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  • How many 60 W lamps may be safely run on a 230 V circuit fitted with a 5 A fuse?Option: 1 2Option: 2</s

How many 60 W lamps may be safely run on a 230 V circuit fitted with a 5 A fuse?

Option: 1

2


Option: 2

19


Option: 3

20


Option: 4

4


Answers (1)

best_answer

\text { Watt }=\text { volt } \times \text { ampere }
\mathrm{ \Rightarrow 60=230 \times I \text { or } I=(6 / 23) \mathrm{A} }

If n lamps are used in parallel, each allowing 6/23 A, then total current,\mathrm{ n \times(6 / 23) \leq 5~ Or ~n \leq 19.1~ or~ n=19 }

Posted by

jitender.kumar

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