ITP 150 Exam 1 Questions with Correct Answers Latest Update 2025-2026
(AC) voltages - Answers Electrical components tend to be larger, and use
higher alternating current (AC) voltages
Flows back and fourth through the circuit and has no fixed polarity.
(DC) voltages - Answers Most electronic components are very small, and
require small direct current (DC) voltages
Flows only in 1 direction with defined polarity.
Has constant Magnitude
Important Conductors (Free Flow Electrons, loosely held) - Answers Silver, Copper, Gold, Iron,
Aluminum, Tungsten
Semi Conductors - Answers Boron, Arsenic, Germanium, Silicon
Insulators (tightly held electrons) - Answers Wood, Air, Porcelain, Rubber,
Pure Silicon, Glass
Coulomb (unit of charge) - Answers Number of Electrons past a point
6.24x10^18 e- = 1AMP
3 Tech Development - Answers Transistors
Steam Engine —> Industrial Evolution
Batteries
Voltage (E) - Answers Electrons moving through conductor
"Electrical Pressure"
"A Difference in Potential (between two points)" "Electromotive Force (EMF)"
- Control Device
- Protection Device
, - Measured in volts, symbol E -or- V
How is electricity transferred - Answers Conduction/Induction
How to measure a circuit - Answers Inseries, Voltmeter (across component)
Induction - Answers bringing charges object near another object
Inverse Square Law - Answers the strength of the force between two charge bodies, is inversely
proportional to the distance between them
Conduction - Answers Direct Contact (Negative --> Positive)
Static Electricity Uses - Answers Printers, Car Painting
Current (I) - Answers "the Flow of Electrons"
- Measured in amperes, symbol I
Resistance - Answers "Opposition to Voltage"
- Measured in ohms, symbol Ω
Why is silver the best conductor? - Answers - It has two valence electrons in the fifth shell
- Electrons in the fifth shell are less tightly held (they are farther from the nucleus) than copper
electrons (which are in the fourth shell)
- Silver, therefore, more easily shares its electrons which makes it the best conductor
- Tungsten: excellent conductor at high temp
Conventional vs Electron Current Flow - Answers Electron Theory: Flows from Negative to
Positive
Conventional Theory: electrons flow from positive (deficient side) to negative
Ohm's Law - Answers E=I*R
E: Volt (electron pressure)
I: Current (Amp)
R: Resistance (Ω) Ohm
Mega - Answers 10^6
(AC) voltages - Answers Electrical components tend to be larger, and use
higher alternating current (AC) voltages
Flows back and fourth through the circuit and has no fixed polarity.
(DC) voltages - Answers Most electronic components are very small, and
require small direct current (DC) voltages
Flows only in 1 direction with defined polarity.
Has constant Magnitude
Important Conductors (Free Flow Electrons, loosely held) - Answers Silver, Copper, Gold, Iron,
Aluminum, Tungsten
Semi Conductors - Answers Boron, Arsenic, Germanium, Silicon
Insulators (tightly held electrons) - Answers Wood, Air, Porcelain, Rubber,
Pure Silicon, Glass
Coulomb (unit of charge) - Answers Number of Electrons past a point
6.24x10^18 e- = 1AMP
3 Tech Development - Answers Transistors
Steam Engine —> Industrial Evolution
Batteries
Voltage (E) - Answers Electrons moving through conductor
"Electrical Pressure"
"A Difference in Potential (between two points)" "Electromotive Force (EMF)"
- Control Device
- Protection Device
, - Measured in volts, symbol E -or- V
How is electricity transferred - Answers Conduction/Induction
How to measure a circuit - Answers Inseries, Voltmeter (across component)
Induction - Answers bringing charges object near another object
Inverse Square Law - Answers the strength of the force between two charge bodies, is inversely
proportional to the distance between them
Conduction - Answers Direct Contact (Negative --> Positive)
Static Electricity Uses - Answers Printers, Car Painting
Current (I) - Answers "the Flow of Electrons"
- Measured in amperes, symbol I
Resistance - Answers "Opposition to Voltage"
- Measured in ohms, symbol Ω
Why is silver the best conductor? - Answers - It has two valence electrons in the fifth shell
- Electrons in the fifth shell are less tightly held (they are farther from the nucleus) than copper
electrons (which are in the fourth shell)
- Silver, therefore, more easily shares its electrons which makes it the best conductor
- Tungsten: excellent conductor at high temp
Conventional vs Electron Current Flow - Answers Electron Theory: Flows from Negative to
Positive
Conventional Theory: electrons flow from positive (deficient side) to negative
Ohm's Law - Answers E=I*R
E: Volt (electron pressure)
I: Current (Amp)
R: Resistance (Ω) Ohm
Mega - Answers 10^6
