A step-up transformer increases 36 V to 180 V .     Part A What is the current in the secondary coil as compared to the primary coil? Assume 100% efficiency.Express your answer using two significant figures.

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Part A A model-train transformer plugs into 120-V ac and draws 0.32 A while supplying 7.8 A to the train. What voltage is present across the tracks? Assume 100% efficiency Express your answer to two significant figures and include the appropriate units. Vs = Value Units Submit Request Answer

A shunt-wound DC motor with the field coils and rotor connected in parallel (Figure 1) operates from a 130 V DC power line. The resistance of the field windings, R, is 208 n. The resistance of the rotor, R. is 4.90 n. When the motor is running, the rotor develops an emf E. The motor draws a current of 4.46 A from the line. Friction losses amount to 45.0 W Part A Compute the field current Ir. Express your answer in amperes. • View Available Hint(s) Temglates Symbols undo regdo Tesel keyboard shortcuts Help A I = 0.56 Submit Prevlous Anewere X Incorrect, Try Again; 4 attempts remaining Part B Compute the rotor current I > View Available Hint(s) Figure 1 of 1 Templates Symbols undo redo Teset keyboard shortcuts Help A. I = 4,26 Submit Prevlous Answers X Incorrect; Try Again; 5 attempts remaining R ER. Part C Compute the emf E.

A generator supplies 130 V to a transformer's primary coil, which has 56 turns. If the secondary coil has 470 turns, what is the secondary voltage? Number i Units

A transformer is designed for use in a neon sign. The input voltage is 120 V and the output needs to be 3000V. The output current is 50mA.  1. If 100 turns are placed on the primary coil, how many turns will need to be on the secondary coil? 2. What is the current in the primary set of coils? 3. What is the power output of the transformer?

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A step-down transformer produces a voltage of 7.0 V across the secondary coil when the voltage across the primary coil is 100 V Part A What voltage appears across the primary coil of this transformer if 100 V is applied to the secondary coil? Express your answer using two significant figures. V₂ = PA [V=| ΑΣΦ 6 ? V

A transformer has 90 turns on the primary coil and 175 turns on the secondary coil. If the AC input current is 5 A, the output current is Select one: O a. 2.6 A O b. 9.7 A O c. 3.5 A O d. 7.8 A