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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: Hydrogen Atomic Emission Spectrum and Production of X-Rays

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  • Questions count: 5
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1.
Which hydrogen spectral series falls within the visible light region of the electromagnetic spectrum?
Balmer Series
Paschen Series
Pfund Series
Lyman Series
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.
A mercury manometer connected to a gas tank shows the mercury level in the free arm is 4 cm higher than the gas arm (Pa = 76 cm Hg). The gas pressure is:
80 cm Hg
76 cm Hg
4 cm Hg
72 cm Hg
4.
In a series R-L-C circuit, when inductive reactance equals capacitive reactance (\(X_L = X_C\)), the total impedance of the circuit is equal to:
C) \(sqrt{R^2 + X_L^2}\)
B) The ohmic resistance \(R\)
A) Zero
D) Infinite
5.
According to the Egyptian Physics syllabus, what is the valid physical deduction for: Resonance Condition in an AC Series RLC Circuit?
At resonance frequency (f_0 = 1 / (2π√(LC))), inductive reactance equals capacitive reactance (X_L = X_C), circuit impedance Z equals pure resistance R, and current is at its maximum value in phase with voltage
Impedance is at its maximum value at resonance
The current lags behind the voltage by 90 degrees at resonance
Resonance occurs only when resistance R is zero
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