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Three appliances are connected in parallel to the same source which provides a voltage of 220 V. A fuse connected to the source will blow if the current from the source exceeds 10 A.

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Three appliances are connected in parallel to the same source which provides a voltage of 220 V. A fuse connected to the source will blow if the current from the source exceeds 10 A. If the three appliances are rated at 60 W, 500 W and 1200 W at 220 V, will the fuse blow?

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P1 = 60 W, P2 = 1200W, P3 = 500W

Fuse rating = 10A

V = 220V

We have,

P = VI

Total power = 60 + 1200 + 500

= 1760W

Therefore, 1760 = 220 x I

I = 8A

The required current is 8A and fuse rating is 10A. So, all the appliances will work normally and the fuse will not blow.

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