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Resistance

Asked by ash.au94 21st September 2009, 10:16 PM
Answered by Expert
Answer:

In order to have same current as the other appliances in combination have, the resistance of the iron should be equal to the resultant resistance of the appliances connected in parallel.

therefore

1/ Rtotal =(1/100) + (1/50) + (1/500)  

1/ Rtotal =(5 + 10 + 1) / 500

Rtotal =  (500 / 16) ohm

Current i = V / Rtotal = 220 x 16 / 500 = 7.04 A 

 

Answered by Expert 23rd September 2009, 9:30 AM
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