Question

An electric kettle rated as 1200W at 220 V and a toaster rated at 1000 W at 220 V are both connected in parallel to a source of 220V. 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.​

Answer 1

Answer:

no both can not used at he same time

Explanation:

R1=V1^2/2R R1=40.33

R2=v2^2/2R R2=48.4

as both in parallel so Req=R1R2/R1+R2

Req=21.9999 nearly 22ohm

current drawn from source of 220V

i=V/R =220/22=10A

but the fuse will blows at 9A while system only work if current should be 10A

thats why they cant use at same time

Answer 2

$P1=1200W, P2=1000W V=220V Fuse rating=9A We know, P=VI Total current required, I=P/V =(P1+P2)/V =(1200+1000)/220 =10A If both the appliances are switched on together, the fuse will get burnt. So, both the appliance cannot be used at same time.Read more on Sarthaks.com - https://www.sarthaks.com/129892/an-electric-kettle-rated-as-1200-w-at-220-v-and-a-toaster-rated-at-1000-w-at-220-v-are-both$

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