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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.
Magnetic Effects of Electric Current
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02/08/2021 12:34 pm
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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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02/08/2021 12:36 pm
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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lakhmir singh (3364)
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magnetic effects (388)
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