Question

Your TV's screen uses 4800 (V) of voltage to operate. To provide 4800 (V), inside your TV there is a transformer that converts wall outlet of 120 (V) to 4800 (V) reaching to the TV screen. The secondary coil of this transformer has 9200 turns. Your TV's screen connected to secondary coil of transformer uses 240 (W) of power. A) Calculate current in secondary coil. B) Is this transformer a step-up or a step-down transformer? C) What is the number of turns in the primary coil of this transformer? D) Calculate the current in the primary coil of transformer.

Answer 1

formula was used.

Voltage across second Voltage across primary ary = 48oou 120v 240W Power consumed (a) Power = V 1 240 (4800) (I) I 0.0SA (6) It a step up transforme because I see secondary > primary NP UP - 48oov 12ou Ns 9200 turus N Ne 230 turus 9200 120 4800 (d) Power) = (Power) primary secondary (Power) - 240W primary 240 (120) I 2A