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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 2 Quiz: Digital Electronics and Logic Gates (NOT, AND, OR)

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  • Questions count: 8
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1.
Which logic gate outputs 0 ONLY when all of its inputs are 0?
NOT Gate
NAND Gate
AND Gate
OR Gate
2.
The Ideal Gas Law combining all empirical gas relationships is mathematically formulated as:
P * V = n * R * T
P * T = n * R * V
P / V = n * R * T
P * V = m * g * h
3.
When an alternating voltage is applied to an AC circuit containing a pure inductor of inductance \(L\), the phase relationship is:
A) Voltage and current are in phase
D) Voltage leads current by \(180^circ\)
C) Voltage leads current by \(90^circ\)
B) Current leads voltage by \(90^circ\)
4.
If the frequency of an AC circuit containing a capacitor is doubled, its capacitive reactance (\(X_C\)) will:
A) Double
C) Decrease to half its initial value
B) Quadruple
D) Remain unchanged
5.
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:
B) The ohmic resistance \(R\)
C) \(sqrt{R^2 + X_L^2}\)
D) Infinite
A) Zero
6.
If both inductance \(L\) and capacitance \(C\) in a resonant circuit are doubled, the resonance frequency will:
B) Quadruple
A) Double
D) Remain unchanged
C) Decrease to half its original value
7.
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 internal resistance r consumes reactive power without heat generation
The current in a series circuit depends only on the external resistance
The terminal voltage of a discharging battery is strictly less than its electromotive force (VB) by the internal potential drop (I*r)
The terminal voltage always exceeds the EMF when supplying current
8.
According to the Egyptian Physics syllabus, what is the valid physical deduction for: Resonance Condition in an AC Series RLC Circuit?
The current lags behind the voltage by 90 degrees at resonance
Resonance occurs only when resistance R is zero
Impedance is at its maximum value at resonance
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
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