004 (part 1 of 3) 10.0 points A step-down transformer s sed for recharg- ing the

Question

004 (part 1 of 3) 10.0 points A step-down transformer s sed for recharg- ing the batteries of portable devices such as tape players. The turns ratio inside the trans former is 141 and it is used with 188 V (rms) houschold service. If particular ideal transformer draws 0.289 from the house outlet, what is the voltage supplied to a tape player from the transformer? Answer in units ofVv. 005 (part 2 of 3) 10.0 points Find the current supplied to a player from the transformer Answer in units of A. 006 (part 3 of 3) 10.0 points How much power is delivered? Answer in units of W

Explanation / Answer

Given that

N1/N2 = 14/1

i1 = 0.289 A

V1 = 188 V

V2 = ?

By the principle of transformer

N1/N2 = V1/V2

V2 = (V1)(N2/N1) = 188*(1/14) = 13.42 V

part 2 of 3

V1/V2 = i2/i1

188/13.42 = i2/0.289

i2 = 188*0.289/13.42 = 4.05 A

part 3 of 3)

power delivered is P = V2*i2 = 13.42*4.05 = 54.34 W

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