What will be the value of the twiddle factor: W42

For all questions in this page, assume that the transformer is ideal. One side of a transformer has 280 turns while the other side has 140 turns. The high voltage side is connected to a 120 Vrms source. The low voltage side (secondary) is connected to an impedance Z₁ = 11.7 + j6.8 0. provide at least 2 digits after the What is the value of the load impedance when referred to the primary? Referred impedance = Q

Assume 120Vrms is applied to the transformer primary (from P1 to P2). What is the expected secondary voltage measured from S1 to S2? 4:1 Np = 320 Ns = 80 S2 P20 80 Vrms 15 Vrms 30 Vrms 60 Vrms

2

Design a flyback converter for an input of 24 V and output of 40 W at 40V. Specify the transformer turns and magnetizing inductance, switching frequency and capacitor to limit the ripple voltage less than 0.5%.

20 What is countertorque a measure of? PRACTICAL APPLICATIONS ou are working as an electrician in a large steel manufacturing plant, and Y in the of doing preventive maintenance on a large DC you are generator. You have megged both the series and shunt field windings and found that each has over 10 M2 to ground. Your ohmmeter, however, indicates a resistance of 1.5 2 across terminals S, and S,. The ohmmeter indicates a resistance of 225 N between terminals F, and F2. Are these readings normal for this type machine, or is there a likely problem? Explain your answer. process

Can you solve D and E

A sinusoidal voltage has a value of 100 volts at 2.5 milliseconds and completes one cycle.It takes 20 milliseconds. Then find the maximum cost and the time to reach it for the first time

Q9. What is the basic principle that a cage winding can be represented by a three-phase winding? Give your explanation.

In a transformer that has 10 times more turns on the secondary side (side 2) than on the primary side (side 1), the magnitude of the voltage/EMF across the windings on the secondary side, E₂ will be... O a.... 10 times lower than the voltage/emf on the primary side, E₁. O b.... the same as the voltage/emf on the primary side. O c.... always zero regardless of the voltage on the primary side, E₁. O d.... 10 times higher than the voltage/emf on the primary side, E₁.