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The fundamental concepts and principles of alternating current (ac) circuits, including topics such as sine wave terminology, frequency, resistance, voltage, transformers, capacitance, inductance, and power relationships. It provides a comprehensive overview of the key aspects of ac circuits, including formulas, calculations, and phase relationships between voltage and current. Likely intended as a study guide or reference material for students in electrical engineering, physics, or related fields, covering the essential knowledge required to understand and analyze ac circuits. The level of detail and the range of topics covered suggest that this document could be useful for university-level courses, providing a solid foundation for further study and application of ac circuit principles.
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0.637 x peak value - answer โ โ In sine wave terminology, the average value is___. 10 Hz - answer โ โ If the time for one cycle is 0.1 second, the frequency is___. 10A - answer โ โ Given: An AC circuit containing resistance only. What is the current flow if the resistance is 15 ohms and the voltage is 150v? 175V - answer โ โ A circuit has a peak voltage of 275V. What is the average voltage value?
2:1 - answer โ โ What is the step-down turns ratio of a transformer with 200 turns in the primary and 100 turns in the secondary? 340V - answer โ โ Given: A circuit has an rms voltage of 120VAC. What is the peak-to-peak voltage? 400W - answer โ โ Calculate the true power in a 2A series RL circuit with a 100 ohms resistor. 40Hz - answer โ โ What is the hertz rating of an AC circuit if the frequency is 20 cycles per 1/2 second? 45 - answer โ โ Given: A 30-microfarad capacitor in parallel with a 15-microfarad capacitor. The total capacitance is___.
Are 90ยฐ out of phase - answer โ โ If the vector diagram of two AC waveforms is a right angle, then the waves___. Are in phase - answer โ โ If the phase angles of two sine waves are both 0 degrees then the waves___. By some angle between 0ยฐ and 90ยฐ - answer โ โ In a circuit that has both capacitance and resistance, the current will lead the voltage___. Current with respect to time - answer โ โ The self-induced voltage across in inductance is equal to the change in___. Frequency increases - answer โ โ Inductive reactance increases as the___.
Greater than the true power - answer โ โ According to the power triangle, the apparent power is___. Increases - answer โ โ If the area of the plates of a capacitor is increased, the amount of capacitance___. Increases - answer โ โ When frequency decreases, capacitive reactance___. Increasing capacitance - answer โ โ For a given frequency, the capacitive reactance decreases with___. induced high voltage - answer โ โ Opening the secondary of a CT under load will cause a dangerous level of___.
Rms values - answer โ โ Unless otherwise noted, the calculations in AC circuits use___. The same as the applied voltage - answer โ โ In a parallel LC circuit, the voltage across the branches is___. Transformer - answer โ โ Which of the following uses electromagnetic induction to transfer electrical energy from one circuit to another? Unlike-wound transformers - answer โ โ Transformers in which the primary and secondary voltages are 180 out of phase are known as___. XL=2piefL - answer โ โ The formula for inductive reactance is___.
Zero - answer โ โ In an inductive AC circuit, when the applied voltage is at its maximum negative value, the current is___.
