ELECTRICAL ENGINEERING 101 FINAL EXAM REVIEWED
QUESTIONS AND ANSWERS.17
1. Atomic structure (3 components) - correct answer
Protons (charge = +1.6E-19C),
Neutrons(charge=0--neutral)
Electrons(charge=-1.6E-19C)
2. Define electrostatic attraction/force - correct answer The force causing electrons to spin in
orbits around the nucleus
3. Define valence electrons - correct answer electrons in the outermost energy level, they are
responsible for forming chemical bonds
4. Define coulumbs law - correct answer The force between electrically charged particles (for
example, electron and proton) is known as electrostatic force and is directly proportional to
the product of the charges (Q1 and Q2), and is inversely proportional to the square of the
distance (s) between them
Charges close by, interact stronger - more force
Charges far away, interact weaker - less force
5. What is the unit of electric Charge? - correct answer Coulomb, C
6. Equation for electrostatic force - correct answer F = k(Q1Q2/s^2)
K is proportionality constant
7. Define electric current - correct answer Electric current is due to the flow of "free
electrons" through an area per unit time
Current (I) = change in charge/change in time interval
8. Define "free electrons" - correct answer The term "free" means that the electrons can move
freely through the lattice structure of the material
ALL THE BEST
, 9. What is the unit of current? - correct answer Ampere (Amps), A
10. What is another term for voltage? - correct answer Potential difference
11. Define electromotive force - correct answer A force provided by voltage that is responsible
for giving free electrons a push to move through a conductor
12. What kind of relationship does voltage have with current? - correct answer Direct,
proportional relationship
13. What is the unit of voltage? - correct answer Volts, V
14. What is the unit of Force? - correct answer Newton (kg*m/s^2), N
15. How does current move in terms of voltage? - correct answer Current always moves from
high voltage to low voltage (opposite direction of electrons).
Current moves from positive charge to negative, electrons move from negative charge to
positive
16. Ohm's Law equation - correct answer V=IR
17. What is the unit of resistance? - correct answer Ohms
18. Define resistance - correct answer The restriction of electrical flow
19. Define voltage - correct answer potential difference between two points
Voltage is always referenced to some point (ex. Ground)
ALL THE BEST
QUESTIONS AND ANSWERS.17
1. Atomic structure (3 components) - correct answer
Protons (charge = +1.6E-19C),
Neutrons(charge=0--neutral)
Electrons(charge=-1.6E-19C)
2. Define electrostatic attraction/force - correct answer The force causing electrons to spin in
orbits around the nucleus
3. Define valence electrons - correct answer electrons in the outermost energy level, they are
responsible for forming chemical bonds
4. Define coulumbs law - correct answer The force between electrically charged particles (for
example, electron and proton) is known as electrostatic force and is directly proportional to
the product of the charges (Q1 and Q2), and is inversely proportional to the square of the
distance (s) between them
Charges close by, interact stronger - more force
Charges far away, interact weaker - less force
5. What is the unit of electric Charge? - correct answer Coulomb, C
6. Equation for electrostatic force - correct answer F = k(Q1Q2/s^2)
K is proportionality constant
7. Define electric current - correct answer Electric current is due to the flow of "free
electrons" through an area per unit time
Current (I) = change in charge/change in time interval
8. Define "free electrons" - correct answer The term "free" means that the electrons can move
freely through the lattice structure of the material
ALL THE BEST
, 9. What is the unit of current? - correct answer Ampere (Amps), A
10. What is another term for voltage? - correct answer Potential difference
11. Define electromotive force - correct answer A force provided by voltage that is responsible
for giving free electrons a push to move through a conductor
12. What kind of relationship does voltage have with current? - correct answer Direct,
proportional relationship
13. What is the unit of voltage? - correct answer Volts, V
14. What is the unit of Force? - correct answer Newton (kg*m/s^2), N
15. How does current move in terms of voltage? - correct answer Current always moves from
high voltage to low voltage (opposite direction of electrons).
Current moves from positive charge to negative, electrons move from negative charge to
positive
16. Ohm's Law equation - correct answer V=IR
17. What is the unit of resistance? - correct answer Ohms
18. Define resistance - correct answer The restriction of electrical flow
19. Define voltage - correct answer potential difference between two points
Voltage is always referenced to some point (ex. Ground)
ALL THE BEST
