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Discussion Response Post to: transformer

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21 May 2008 10:14:57 IST

Subject: Re:transformer

Mr.IITIAN007 (3000)

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We know that efficiency = power output / power inout = V_s I_s / V_p I_p

Now u have V_s = 12 V and P_s = 36 W

Use the formula P = V² / R to get the value of R as 4 ohms and then use V=I R to get the value of I_s as 3 A

Now 75 / 100 = 3 x 12 / I_p x 220

solve to get I_p as 0.21 A

Ken
From: UNITED STATES, Green Bay, Wisconsin

this reply: 15 points (with 3 Olaaa!! Perrrfect answer.

in 3 votes ) [?]

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