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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: Mutual Induction Between Two Coils and Self-Induction of a Single Coil

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1.
If both the absolute temperature and the absolute pressure of a confined ideal gas are doubled, the volume of the gas:
Remains constant and unchanged
Decreases to one-fourth
Doubles to twice its original volume
Quadruples
2.
STEM Modern Physics Laser Problem 19: What fundamental condition is strictly required to achieve laser amplification via stimulated emission?
Thermal equilibrium where ground state atoms dominate
High electrical resistance in the discharge tube
Population inversion, where the number of atoms in the metastable excited state exceeds that in the lower energy state
Complete absence of resonant optical mirrors
3.
STEM Modern Physics Laser Problem 39: What fundamental condition is strictly required to achieve laser amplification via stimulated emission?
Population inversion, where the number of atoms in the metastable excited state exceeds that in the lower energy state
Complete absence of resonant optical mirrors
High electrical resistance in the discharge tube
Thermal equilibrium where ground state atoms dominate
4.
In an R-L-C circuit, if \(V_R = 30\) V, \(V_L = 80\) V, and \(V_C = 40\) V, the total supply voltage across the circuit is:
B) 70 V
D) 10 V
A) 150 V
C) 50 V
5.
Boyle's Law states that for a fixed mass of an ideal gas kept at constant temperature, the volume V is:
Directly proportional to pressure
Independent of pressure changes
Inversely proportional to its absolute pressure P (P1 * V1 = P2 * V2)
Directly proportional to absolute temperature
6.
The relative density (specific gravity) of a substance is defined as:
The ratio of the density of the substance to the density of pure water at 4°C
The mass of the substance divided by its volume at 100°C
The product of density and the acceleration due to gravity
The reciprocal of the buoyant force
7.
STEM Modern Physics Laser Problem 36: What fundamental condition is strictly required to achieve laser amplification via stimulated emission?
Population inversion, where the number of atoms in the metastable excited state exceeds that in the lower energy state
Complete absence of resonant optical mirrors
High electrical resistance in the discharge tube
Thermal equilibrium where ground state atoms dominate
8.
STEM Modern Physics Laser Problem 15: What fundamental condition is strictly required to achieve laser amplification via stimulated emission?
Population inversion, where the number of atoms in the metastable excited state exceeds that in the lower energy state
High electrical resistance in the discharge tube
Complete absence of resonant optical mirrors
Thermal equilibrium where ground state atoms dominate
9.
STEM Modern Physics Laser Problem 27: What fundamental condition is strictly required to achieve laser amplification via stimulated emission?
Population inversion, where the number of atoms in the metastable excited state exceeds that in the lower energy state
Thermal equilibrium where ground state atoms dominate
Complete absence of resonant optical mirrors
High electrical resistance in the discharge tube
10.
The volume expansion coefficient at constant pressure (alpha_v) of an ideal gas is physically measured using:
A hydrometer
Joly's bulb apparatus or Charles's apparatus with a dry mercury droplet index
A venturi meter and manometer
A torsion balance
11.
STEM Modern Physics Laser Problem 35: What fundamental condition is strictly required to achieve laser amplification via stimulated emission?
Population inversion, where the number of atoms in the metastable excited state exceeds that in the lower energy state
Thermal equilibrium where ground state atoms dominate
Complete absence of resonant optical mirrors
High electrical resistance in the discharge tube
12.
STEM Modern Physics Laser Problem 24: What fundamental condition is strictly required to achieve laser amplification via stimulated emission?
Thermal equilibrium where ground state atoms dominate
High electrical resistance in the discharge tube
Population inversion, where the number of atoms in the metastable excited state exceeds that in the lower energy state
Complete absence of resonant optical mirrors
13.
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
C) Voltage leads current by \(90^circ\)
B) Current leads voltage by \(90^circ\)
D) Voltage leads current by \(180^circ\)
14.
In a U-tube manometer containing two immiscible liquids in equilibrium, the heights of the liquid columns measured above the separating surface are:
Equal regardless of the liquids used
Proportional to the square of the cross-sectional area of the tube
Directly proportional to their densities
Inversely proportional to their respective densities (h1 / h2 = rho2 / rho1)
15.
STEM Modern Physics Laser Problem 40: What fundamental condition is strictly required to achieve laser amplification via stimulated emission?
Population inversion, where the number of atoms in the metastable excited state exceeds that in the lower energy state
Thermal equilibrium where ground state atoms dominate
Complete absence of resonant optical mirrors
High electrical resistance in the discharge tube
16.
According to Wien's Displacement Law, when the absolute temperature of a radiating blackbody increases, the wavelength at peak intensity (\(\lambda_{\max}\)):
A) Increases proportionally
B) Decreases proportionally to the inverse of temperature
C) Remains strictly constant
D) Shifts into the radio frequency spectrum
17.
The Ideal Gas Law combining all empirical gas relationships is mathematically formulated as:
P / V = n * R * T
P * V = m * g * h
P * V = n * R * T
P * T = n * R * V
18.
If the frequency of an AC circuit containing a capacitor is doubled, its capacitive reactance (\(X_C\)) will:
C) Decrease to half its initial value
D) Remain unchanged
A) Double
B) Quadruple
19.
Light of frequency \(3 \times 10^{14}\) Hz shines on a metal whose threshold frequency is \(4.5 \times 10^{14}\) Hz. If the intensity is increased 100 times, the photoelectric current will be:
B) 10 times initial current
A) 100 times initial current
D) Infinite
C) Zero
20.
According to the Egyptian Physics syllabus, what is the valid physical deduction for: Resonance Condition in an AC Series RLC Circuit?
Resonance occurs only when resistance R is zero
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
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