10. Alternating Currents.md
2024-4-11|2024-4-12
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Characteristics of Alternating Currents
- Dictation/Definition: Define the terms "period," "frequency," and "peak value" as they apply to an alternating current or voltage. And show the quantity on a Point out these Physics Quantity on a sinusoidal wave graph. Answer:
- Application: Explain how the equation represents a sinusoidally alternating current or voltage. Answer:
- Formula Recall: State the relationship between the mean power and the maximum power in a resistive load for a sinusoidal alternating current. Answer:
- Conceptual Understanding: Distinguish between root-mean-square (r.m.s.) values and peak values. Provide the formulas for calculating the r.m.s. current and voltage for a sinusoidal alternating current. Answer:
Rectification and Smoothing
- Graphical Distinction: Distinguish graphically between half-wave and full-wave rectification. Answer:
- Explanation: Explain how a single diode is used for half-wave rectification of an alternating current. Answer:
- Full-Wave Rectification: Describe the use of four diodes in a bridge rectifier configuration for full-wave rectification of an alternating current. Answer:
- Smoothing Analysis: Analyse the effect of a single capacitor in smoothing the output of a rectified current, including how capacitance and load resistance values affect the smoothing. Answer:
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