Can somebody help me please i\'m having a hard time with thisone A step-down tra

Question

Can somebody help me please i'm having a hard time with thisone A step-down transformer is used for recharging the batteriesof portable devices. The turnsratio N2/N1 for aparticular transformer used in a CD player is 4:66. Whenused with 120 V (rms) household service, the transformer draws anrms current of 125 mA. Find thefollowing. (a) rms output voltage of the transformer
V

(b) power delivered to the CD player
W A step-down transformer is used for recharging the batteriesof portable devices. The turnsratio N2/N1 for aparticular transformer used in a CD player is 4:66. Whenused with 120 V (rms) household service, the transformer draws anrms current of 125 mA. Find thefollowing. (a) rms output voltage of the transformer
V

(b) power delivered to the CD player
W (a) rms output voltage of the transformer
V

(b) power delivered to the CD player
W

Explanation / Answer

Given N 2 / N 1 = 4 : 66 Input rms voltage V 1 = 120 V we know V 2 / V 1 = N 2 / N 1 So, rms output voltage of the transformer V 2 = V 1 ( N 2/N 1 )                                                                      = 7.2727 V (b). power delivered to the CD player P = V 2 * i2                                                              = 7.2727 V * 125 mA                                                              = 7.2727 V * 0.125A                                                                            = 0.9090 W

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