QJEEM14Phc0a6: JEE Main 2014 Physics - Class 12 JEEM14Phc0a6 Solution: In a large building, three are bulbs of , bulbs of , fans of…

Question

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In a large building, three are

15

bulbs of

40

W

,

5

bulbs of

100

W

,

5

fans of

80

W

and

1

heater of

1

kW.

The voltage of electric mains is

220

V.

The minimum capacity of the main fuse of the building will be:

Accepted Answer

Total power consumed by electrical appliances in the building,

{P_{total}} = 2500W

Watt

=

Volt

\times

ampere

\Rightarrow 2500 = V \times {\rm I}

\Rightarrow 2500 = 220

{\rm I}

\Rightarrow I = {{2500} \over {220}} = 11.36 \approx 12A

(Minimum capacity of main fuse)

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