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Physics

Chapter 4 - Alternating Current AC Circuits

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Chapter 5 - Dual Nature of Wave and Particle

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Chapter 6 - Atomic Spectra and X-Rays

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Chapter 7 - Lasers and Principles

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Chapter 8 - Modern Electronics and Semiconductors

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Quiz

Lesson 1 Quiz: Intrinsic and Doped Semiconductors, the p-n Junction and Transistors

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1.
According to the Egyptian Physics syllabus, what is the valid physical deduction for: Ohm's Law for a Closed Circuit: V = VB - I*r?
The terminal voltage of a discharging battery is strictly less than its electromotive force (VB) by the internal potential drop (I*r)
The internal resistance r consumes reactive power without heat generation
The current in a series circuit depends only on the external resistance
The terminal voltage always exceeds the EMF when supplying current