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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 3 Quiz: The Alternating Current Generator (AC Dynamo) and Rectification

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  • Questions count: 20
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1.
STEM AC Transformer Problem 9: 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?
1.5 A
2.0 A
0.109 A
0.545 A
2.
Absolute zero temperature (0 Kelvin or -273.15 °C) is defined physically as the theoretical temperature at which:
All liquids solidify into glass
Water reaches its maximum density
Atmospheric air completely combusts
The volume and pressure of an ideal gas theoretically extrapolate to zero and translational molecular motion reaches its quantum minimum
3.
STEM AC Transformer Problem 26: 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
1.5 A
0.545 A
2.0 A
4.
STEM AC Transformer Problem 5: 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
0.109 A
1.5 A
5.
STEM AC Transformer Problem 42: 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
6.
STEM AC Transformer Problem 15: 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
1.5 A
2.0 A
0.545 A
7.
Real gases behave most closely to an ideal gas under conditions of:
High pressure and near liquefaction point
Zero gravitational acceleration
Extremely high pressure and low temperature
Very low pressure and high temperature (where intermolecular attraction forces and molecular volumes become negligible)
8.
STEM Modern Physics Laser Problem 1: 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
9.
STEM Modern Physics Laser Problem 35: 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
Complete absence of resonant optical mirrors
Population inversion, where the number of atoms in the metastable excited state exceeds that in the lower energy state
10.
STEM AC Transformer Problem 34: 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?
1.5 A
0.545 A
0.109 A
2.0 A
11.
STEM AC Transformer Problem 24: 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
0.109 A
0.545 A
1.5 A
12.
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?
1.5 A
0.545 A
0.109 A
2.0 A
13.
STEM AC Transformer Problem 13: 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
0.545 A
1.5 A
2.0 A
14.
STEM AC Transformer Problem 27: 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
1.5 A
2.0 A
0.545 A
15.
STEM Modern Physics Laser Problem 2: What fundamental condition is strictly required to achieve laser amplification via stimulated emission?
Thermal equilibrium where ground state atoms dominate
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
16.
STEM Modern Physics Laser Problem 17: 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
17.
STEM AC Transformer Problem 35: 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
0.545 A
1.5 A
2.0 A
18.
STEM AC Transformer Problem 28: 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
1.5 A
0.545 A
0.109 A
19.
STEM Modern Physics Laser Problem 30: What fundamental condition is strictly required to achieve laser amplification via stimulated emission?
Complete absence of resonant optical mirrors
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
20.
STEM AC Transformer Problem 39: 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
0.545 A
1.5 A
2.0 A
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