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Physics

Chapter 1 - Electric Current, Ohms Law and Kirchhoffs Laws

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Chapter 2 - Magnetic Effects of Electric Current and Measuring Instruments

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Chapter 3 - Electromagnetic Induction and AC Dynamo and Transformer

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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.
The relative density (specific gravity) of a substance is defined as:
The mass of the substance divided by its volume at 100°C
The ratio of the density of the substance to the density of pure water at 4°C
The reciprocal of the buoyant force
The product of density and the acceleration due to gravity
2.
Why are hydroelectric storage dams constructed with a base that is significantly thicker than the crest?
Because hydrostatic water pressure increases linearly with depth (P = rho * g * h), exerting immense overturning forces at the bottom
To prevent solar radiation from penetrating the foundation
To reduce the gravitational pull of the bedrock
To allow fish to swim upstream through drainage gates
3.
The Ideal Gas Law combining all empirical gas relationships is mathematically formulated as:
P * V = n * R * T
P / V = n * R * T
P * T = n * R * V
P * V = m * g * h
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