Neon signs (which often contain gases other than neon) use high voltage to excite gaseous atoms that then give off a characteristic glow. When plugged into a wall outlet (120 V AC), a typical neon sign transformer delivers 400 W AC at a voltage of 18 kV rms. The primary coil has 400 turns. 1. First, what is the number of turns in the secondary to achieve this high voltage? Give your answer to 2 significant digits. 2. Next, if the transformer is ideal, what is the rms current in the primary? Give you answer in amps with 2 significant digits. 3. Finally, what is the rms current in the secondary? Give your answer in milli-amps with 2 significant digits.

Neon signs (which often contain gases other than neon) use high voltage to excite gaseous atoms that then give off a characteristic glow. When plugged into a wall outlet (120 V AC), a typical neon sign transformer delivers 400 W AC at a voltage of 18 kV rms. The primary coil has 400 turns. 1. First, what is the number of turns in the secondary to achieve this high voltage? Give your answer to 2 significant digits. 2. Next, if the transformer is ideal, what is the rms current in the primary? Give you answer in amps with 2 significant digits. 3. Finally, what is the rms current in the secondary? Give your answer in milli-amps with 2 significant digits.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter4: Symbols

Section: Chapter Questions

Problem 7SQ: The symbol shown is a(n) a. iron core transformer. b. auto transformer. c. current transformer. d....

See similar textbooks

Similar questions

All values of a transformer are proportional to its __________________ ___________________.
Which of the following statements is true about an ideal transformer? O It changes the magnitude of DC signals. O It converts DC signals into AC signals. O It converts AC signals into DC signals. O It changes the magnitude of AC signals. hp
How do i calculate secondary current in transformer analysis
A 200 V/100 V, 50 Hz transformer is to be excited at 40 Hz from 100 V side. For the exciting current to be constant, the applied voltage should be ?
Determine Rz for a 12 V Zener regulator is used with a dc input of 20 V, a load current of 65 mA, and a Zener current of 20 mA. Rz DC Input Zener R diode 91.4 ohms O 14.9 ohms 49.1 ohms O 94.1 ohms
The equivalent resistance of the primary of a transformer having K = 6 and R1 = 0.2 ohm when referred to secondary becomes.......ohm. Group of answer choices 0.004 7.2 0.72 0.0055
Time left 0:34:48 A (220/22) kV, 100 MVA transformer has x-0.5 pu, then its x in Q on the high voltage side is equal to: Answer: Next page age a Power syster General (Power Sys... arch
Transformer 1) Enumerate the way/s by which the voltage of the large coil may be: a) increased (AC source) b) reduced to zero (AC source) c) increased (DC source) d) reduced to zero (DC source)
Q5. For the following center tapped transformer, show the waveform across each half of the secondary winding and across R, when a 100 V peak sine wave is applied to the primarywinding. What is the PIV rating must the diodeshave? (Use constant voltage drop model for the Silicon diode) D IN4001 OV 10 kN IN4001 DELL
please answer 4 four questions correctly and no need to write your explnation just final answer 1. The various types of errors in dynamometer wattmeters are A./Error due to Eddy currents B./Error due to pressure coil inductance C./All of above D./Error due to pressure coil capacitance E./Error due to friction 2.The primary winding of a potential transformer has A./no turns B/a larger number of turns C/a few turns only D/intermediate number of turns 3. The current transformer (CT) and potential transformer (PT) are used for A.measuring low current and voltages B.measuring high resistances and frequencies C.measuring very low current and voltages D.measuring high currents and voltages 4. The secondary winding of a potential transformer has A/ no turns B.intermediate number of turns C.a few turns only D.a large number of turns
A 200 V/100 V, 50 Hz transformer is to be excited at 40 Hz from 100 V side. For the exciting current to be same, the applied voltage should be ?
a) The transformer has a turns ratio of 9.45, what is the dc load voltage considering the ripple voltage? b) The transformer has a turns ratio of 9.45, what is the dc load voltage without considering the ripple voltage?in 2 decimal places.