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CBSE Class 10 Answered

HEAT
Asked by baidshryans | 27 Dec, 2008, 01:08: PM
Expert Answer

Let 'r' be the resistance of the electric kettle,  v1= 22o v , t1 = 6.5 min , v2= 200 v , t2 = ?

 As the heat produced in both the cases will be same ,

Use the relation, 

heat produced =   v12 t1 / r =  v22 t2 / r     

and plug in the values , to get the time t2, required if the supply had been 200V  .           

Answered by | 27 Dec, 2008, 09:10: PM
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