Alternating Current Class 12 Physics Chapter 7 One Shot | New NCERT syllabus CBSE | Full chapter
LearnoHub - Class 11, 12・2 minutes read
The text discusses the importance of alternating current (AC) in homes for powering electrical devices and details various aspects of AC circuits, including resistive, inductive, and capacitive circuits. It also explores phasor diagrams, LCR circuits, resonance, transformers, and the functioning of AC generators.
Insights
- Alternating current (AC) is crucial for powering most household electrical devices like fridges, TVs, and microwaves, as it involves periodic changes in current direction, unlike direct current (DC).
- Understanding root mean squared (RMS) voltage and current in AC circuits is essential for calculating power accurately, with resistive circuits producing sine wave potential differences denoted by specific symbols.
- Phasor diagrams play a vital role in representing the relationship between voltage and current in different AC circuits, showcasing how current leads voltage by Pa/2 in inductive circuits while voltage and current are in phase in capacitive circuits.
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Recent questions
What is alternating current?
AC is the electricity in homes, essential for devices.
How is power calculated in a resistive AC circuit?
Power in a resistive circuit is calculated using current, resistance, and voltage.
What is the significance of root mean squared (RMS) values in AC circuits?
RMS values are crucial for calculating effective voltage and current in AC circuits.
How are phasor diagrams used in AC circuits?
Phasor diagrams represent the relationship between voltage and current in AC circuits.
What is resonance in an AC circuit?
Resonance occurs when a circuit oscillates at maximum amplitude at a specific frequency.
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