Estimate the efficiency of high frequency

Posted on 2013-12-27 23:03:00 in Physics by JESSY

Estimate the efficiency of high frequency induction furnace which takes 12 minutes to melt 2.5 kg of aluminium, the input to the furnace being 3.75kw. The initial temperature is 20^oC. Specific heat of aluminium 880J kg^-1 C^o-1. Melting point 650^oC, latent heat of fusion 32 KJ/kg. 

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