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A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24Omega resistance, which may be used separately, in series or in parallel. What are the currents in the three cases? |
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Answer» SOLUTION :CASE [i] `R=24+24=48Omega` `I=V/R=220/48=4.6A` Case [II] `1/R=1/24+1/24=2/24=1/12` `R=12Omega` THEREFORE `I=220/12=18.3A`. Case [III] `I=V/R=220/24=9.2A`. |
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