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Magnetic Effects of Electric Current
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02/08/2021 12:42 pm
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An electric kettle rated as 1200 W at 220 V and a toaster rated at 1000 W at 220 V are both connected in parallel to a source of 220 V. If the fuse connected to the source blows when the current exceeds 9.0 A, can both appliances be used at the same time? Illustrate your answer with calculations.
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02/08/2021 12:45 pm
P1 = 1200W, P2 = 1000W
V = 220V
Fuse rating = 9A
We know,
P = VI
Total current required
I = \(\frac{P}{V}\)
= (P1+P2)/V
= (1200+1000)/220
= 10A
If both the appliances are switched on together, the fuse will get burnt. So, both the appliance cannot be used at same time.