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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: Combined RLC Circuits, Impedance and Electrical Resonance

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  • Questions count: 20
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1.
STEM Compton Effect Problem 35: In the Compton scattering effect, when a high-energy X-ray photon collides with a free stationary electron, which change occurs to the scattered photon?
Its speed decreases significantly while wavelength remains constant
Its frequency increases and energy increases
Its mass increases while kinetic energy decreases
Its frequency decreases, its wavelength increases, and its speed remains strictly c (speed of light)
2.
STEM Modern Physics Laser Problem 18: What fundamental condition is strictly required to achieve laser amplification via stimulated emission?
Thermal equilibrium where ground state atoms dominate
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
3.
STEM Magnetic Force Problem 29: A straight conductor of length 0.50 m carries a current of 4.0 A in a uniform magnetic field of flux density 0.20 T. What is the magnetic force acting on the wire when it is inclined at 30° to the field lines?
0.40 N
0.346 N
0.10 N
0.20 N
4.
STEM Semiconductor Electronics Problem 42: How is a p-type semiconductor crystal produced from pure intrinsic silicon?
By doping with pentavalent Phosphorus atoms
By cooling silicon to absolute zero Kelvin
By doping the silicon crystal with trivalent impurity atoms (such as Boron or Aluminum), creating positive holes as majority carriers
By heating pure silicon above 1,000°C without impurities
5.
STEM Magnetic Force Problem 42: A straight conductor of length 0.50 m carries a current of 4.0 A in a uniform magnetic field of flux density 0.20 T. What is the magnetic force acting on the wire when it is inclined at 30° to the field lines?
0.20 N
0.346 N
0.40 N
0.10 N
6.
STEM Magnetic Force Problem 26: A straight conductor of length 0.50 m carries a current of 4.0 A in a uniform magnetic field of flux density 0.20 T. What is the magnetic force acting on the wire when it is inclined at 30° to the field lines?
0.20 N
0.10 N
0.346 N
0.40 N
7.
STEM Compton Effect Problem 6: In the Compton scattering effect, when a high-energy X-ray photon collides with a free stationary electron, which change occurs to the scattered photon?
Its frequency decreases, its wavelength increases, and its speed remains strictly c (speed of light)
Its frequency increases and energy increases
Its mass increases while kinetic energy decreases
Its speed decreases significantly while wavelength remains constant
8.
STEM Semiconductor Electronics Problem 12: How is a p-type semiconductor crystal produced from pure intrinsic silicon?
By doping with pentavalent Phosphorus atoms
By cooling silicon to absolute zero Kelvin
By heating pure silicon above 1,000°C without impurities
By doping the silicon crystal with trivalent impurity atoms (such as Boron or Aluminum), creating positive holes as majority carriers
9.
STEM Compton Effect Problem 32: In the Compton scattering effect, when a high-energy X-ray photon collides with a free stationary electron, which change occurs to the scattered photon?
Its frequency decreases, its wavelength increases, and its speed remains strictly c (speed of light)
Its mass increases while kinetic energy decreases
Its frequency increases and energy increases
Its speed decreases significantly while wavelength remains constant
10.
STEM Magnetic Force Problem 27: A straight conductor of length 0.50 m carries a current of 4.0 A in a uniform magnetic field of flux density 0.20 T. What is the magnetic force acting on the wire when it is inclined at 30° to the field lines?
0.40 N
0.346 N
0.10 N
0.20 N
11.
STEM Physics Problem 27: A copper wire of resistance 8.0 Ω is drawn out uniformly so that its length increases to three times its original value. Assuming constant mass and density, what is the new resistance of the wire?
16.0 Ω
24.0 Ω
72.0 Ω
2.67 Ω
12.
STEM Compton Effect Problem 12: In the Compton scattering effect, when a high-energy X-ray photon collides with a free stationary electron, which change occurs to the scattered photon?
Its frequency decreases, its wavelength increases, and its speed remains strictly c (speed of light)
Its frequency increases and energy increases
Its speed decreases significantly while wavelength remains constant
Its mass increases while kinetic energy decreases
13.
STEM Compton Effect Problem 17: In the Compton scattering effect, when a high-energy X-ray photon collides with a free stationary electron, which change occurs to the scattered photon?
Its frequency decreases, its wavelength increases, and its speed remains strictly c (speed of light)
Its speed decreases significantly while wavelength remains constant
Its frequency increases and energy increases
Its mass increases while kinetic energy decreases
14.
STEM Magnetic Force Problem 33: A straight conductor of length 0.50 m carries a current of 4.0 A in a uniform magnetic field of flux density 0.20 T. What is the magnetic force acting on the wire when it is inclined at 30° to the field lines?
0.20 N
0.10 N
0.346 N
0.40 N
15.
STEM Magnetic Force Problem 31: A straight conductor of length 0.50 m carries a current of 4.0 A in a uniform magnetic field of flux density 0.20 T. What is the magnetic force acting on the wire when it is inclined at 30° to the field lines?
0.346 N
0.10 N
0.20 N
0.40 N
16.
STEM AC Transformer Problem 4: An ideal step-down transformer connected to a 220 V mains supply delivers power to a 12 V, 24 W lamp. What is the current flowing in the primary coil?
2.0 A
0.545 A
1.5 A
0.109 A
17.
STEM Semiconductor Electronics Problem 40: How is a p-type semiconductor crystal produced from pure intrinsic silicon?
By heating pure silicon above 1,000°C without impurities
By cooling silicon to absolute zero Kelvin
By doping the silicon crystal with trivalent impurity atoms (such as Boron or Aluminum), creating positive holes as majority carriers
By doping with pentavalent Phosphorus atoms
18.
STEM AC Transformer Problem 6: An ideal step-down transformer connected to a 220 V mains supply delivers power to a 12 V, 24 W lamp. What is the current flowing in the primary coil?
0.109 A
2.0 A
1.5 A
0.545 A
19.
STEM Modern Physics Laser Problem 34: What fundamental condition is strictly required to achieve laser amplification via stimulated emission?
Complete absence of resonant optical mirrors
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
Thermal equilibrium where ground state atoms dominate
20.
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:
A) 100 times initial current
C) Zero
D) Infinite
B) 10 times initial current
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