A circuit has a line of 5 A. How many lamps of rating 40W; 220 V can simultaneously run on this line safely?
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let x number of bulbs can be used
so
P=VI
P*x= 220*5
40*x=220*5
x=220*5/40
x=27.5
x=27 bulbs
as not more than 27.5 bulbs can be used thats is why we will not round it off to 28...please thank us..as we try our best to help you...
so
P=VI
P*x= 220*5
40*x=220*5
x=220*5/40
x=27.5
x=27 bulbs
as not more than 27.5 bulbs can be used thats is why we will not round it off to 28...please thank us..as we try our best to help you...
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