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ECT 122 Entire Course New > ECT 125 Entire Course New > Flashcards

ECT 125 Entire Course New Flashcards

1
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ECT 125 Week 7 Homework NEW

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ECT 125 Week 7 Homework NEW

ECT 125 HW#7 – 1 August 19, 2014 NAME:

1. A transformer with a 250mA AC primary current and a 4:1 turns ratio has a secondary current of? 
1 A 250 mA 
4 A 
400 mA 
None of the above
  1. A transformer that has 1500 windings around the core for the primary and 250 secondary windings will have a turns ratio of ___ to 1.
3. A transformer with a 40-V AC primary voltage and a 3:5 turns ratio has an output voltage of 
24 V 
40 V 
4 V 
66.7 V
  1. If a transformer has a turns ratio of 1: 5 and a secondary voltage of 20 V AC, the primary voltage will be?
5 V 
20 V 
1.25 V 
80 V 
None of the above
  1. A resistive load of 500 Ohm is connected across the secondary windings of a 2:1 transformer. If the primary voltage is 50 V AC, what will be the secondary current?

100 mA
2 mA
50 mA 1 mA
None of the above

A

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ECT 125 Week 1 Homework New

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ECT 125 Week 1 Homework New

Homework Assignment

Chapter 10

  1. ) Calculate the value ofvLdeveloped across a 4.7 H coil when the instantaneous rate of change in component current equals 1.5 A/s.
  2. ) Calculate the value ofvLdeveloped across a 470 µH coil when the instantaneous rate of change in component current equals 2 mA/µs.
  3. ) Calculate the value of the air-core inductor shown
  4. ) Calculate the value of the iron-core inductor shown
  5. ) The coils show have a value ofk= 0. Calculate the total inductance in the circuit

Chapter 12

  1. ) A capacitor is storing 100 μC of charge when the difference of potential across its plates is 40 V. Calculate the value of the component.
  2. ) Determine the charge that a 100 pF capacitor stores when the difference of potential across its plates is 25 V.
  3. ) Calculate the total capacitance in the series circuit shown
  4. ) Calculate the total capacitance in the series circuit shown
  5. ) Calculate the total capacitance in the parallel circuit shown

Chapter 16

  1. ) Determine the time constant for the circuit shown
  2. ) Determine the time required for the current in the circuit shownto reach its peak value.
  3. ) An RL switching circuit has values of R= 33 Ω, L= 100 μH, andIpk= 75 mA. Determine the value of the circuit current (It) at the following times
  4. ) Determine the time required forVRto reach 18 V on the rise curve
  5. ) Determine the time constant for the circuit shown
  6. ) Determine the time required forVC in the circuit shownto reach its peak value
  7. ) An RC switching circuit has values of R= 120 Ω, C= 47 μF, andVpk = 8 V. Determine the value of VC at the following times
  8. ) Refer to the following figure. Determine the time required forVCto reach 15 V on its rise curve
A

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ECT 125 Week 2 Homework New

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ECT 125 Week 2 Homework New

Chapter 9.

  1. Calculate the period of the waveform shown in Figure 9.45
  2. Calculate the period of the waveform shown in Figure 9.46b
  3. Calculate the frequency of the waveform shown in Figure 9.45.
A

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ECT 125 Week 3 Homework New

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ECT 125 Week 3 Homework New

Calculate total impedance (ZT) and voltage values (VR, VL, VC) for the circuit shown below where the voltage source values are: v = 4V, f = 800 Hz.

A

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5
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ECT 125 Week 4 Homework New

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ECT 125 Week 4 Homework New

Chapter 11, Page 349-350, problems 20, 22, 24, 26, 30 and 32

  1. A parallel RL circuit has values of IL= 240mA and IR = 180mA. Calculate the magnitude and phase angle of the circuit current.
  2. Calculate the total impedance for the circuit shown in Figure 11.38b.
  3. Calculate the magnitude and phase angle of the circuit impedance shown in Figure 11.39b.
  4. Calculate the component current and power values for the circuit in Figure 11.40b. Then, calculate the values of IT and PAPP.
  5. The voltage source in Figure 11.42b has the frequency limits shown. Calculate the circuit current and impedance values at the frequency limits of the source.
  6. Refer to problem 24. Express the circuit impedance in rectangular form.

Chapter 13, Pages 409–411, problems: 22, 24, 26, 28, 30, and 32

  1. A parallel RC circuit has values of IC = 320mA and IR = 140mA. Calculate the magnitude and phase angle of the circuit current.
  2. Calculate the magnitude of ZT for the circuit shown in Figure 13.37b.
  3. Calculate the magnitude and phase angle of the circuit impedance in Figure 13.38b.
  4. Calculate the impedance, current and power values for the circuit in Figure 13.39b.
  5. The voltage source in Figure 13.40b has the frequency limits shown. Calculate the circuit current and impedance values at the frequency limits of the source.
  6. Refer to problem 26. Express the circuit impedance in rectangular form.

Chapter 14, Pages 445–447, problems: 12, 14, 28, and 30

  1. Determine the magnitude and phase angle of the circuit current shown in Figure 14.41b.
A

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6
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ECT 125 Week 5 Homework New

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ECT 125 Week 5 Homework New

Chapter 11

  1. Calculate the current and voltage values for the circuit shown in Figure 11.43b.

Chapter 13

  1. Calculate the current and voltage values for the circuit shown in Figure 13.41b.

Chapter 14

  1. Calculate the impedance, current and voltage values for the circuit shown in Figure 14.50b.
  2. Calculate the impedance, current and voltage values for the circuit shown in Figure 14.51b.
A

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7
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ECT 125 Week 6 Homework NEW

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ECT 125 Week 6 Homework NEW

Chapter 14, Page 445, problems: 16 and 18

Chapter 15, Pages 487–488, problems: 2, 4, 6, 8, 20, 22, 24, 26, 28, 30, 32, 34, 36, and 38

A

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ECT 122 Entire Course New (10 decks)

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