Sltc Final Review
1. 2. Define the law of charges and the law of centrifugal opposites attract and like
force. chargers repel. Centrifu-
gal force a spinning object
will pull away from its cen-
ter point the faster it spins
the greater the force be-
comes.
2. 3. What is a free electron? An electron that has de-
tached from the atom.
3. Identify and define the categories of atoms based Conductor 3 or less. Semi
upon the number of electrons in their valance shell. conductor 4. Insulator 5 or
more.
4. How many basic sources of energy can be used to 6 total and most common
detach electrons? What are they? What are the two magnetism and chemical
most commonly used? reaction
5. Define static electricity. How is it produced? Static means not moving.
Is a charge not a current
produced by friction
6. 7. What is photoelectric effect? When light causes atoms
to release electrons
7. 8. How do batteries work? Chemical reaction
8. 9. Transformers, What are they and how do they work? step up/ step down volt-
age they work by ac
components that make
good use of the induction
process
, Sltc Final Review
9. How does the speed of the conductor passing through when the wire moves
the magnetic field eFect the current produced? faster a larger current is
produced
10. When is an electromagnetic field present, and how Only present when current
does it build and collapse? is flowing
11. Define Induction. Relative motion between a
magnetic field and a con-
ductor that creates a volt-
age in the conductor
12. What are the diFerences between step-up and coils
step-down transformers?
13. 14.What is the diFerence between Alternating current Dc flows in only one di-
and Direct current? rection. Ac reverses direc-
tion as it flows: electrons
flow back and forth con-
tinuously
14. 15.What eFect does voltage have on the overall power Voltage is the driving force
system design? that makes electrons flow
15. 16.Define the terms voltage, current, resistance, and Voltage, current amount,
power. resistance opposes flow,
power work done
16. 17.What is Ohm's Law? Relationship between cur-
rent voltage and resis-
tance
17. 18.What aFects the resistance of a conductor?
, Sltc Final Review
Material, length, size of
cross section
18. 19.What is represented by the letters E, I, R, P? E-voltage I-current R-re-
sistance (ohms) p-power
(watts)
19. 20.Define the term joule. The unit of electrical work
20. 1. Define Power and how it is measured. Power is defined as the
rate at which work is
done. In an electrical cir-
cuit, power is calculated by
multiplying voltage times
current.
21. Why are power ratings important? If an electrical device is
operated so that it re-
ceives more power than
it is rated for, the ex-
cess power is converted to
heat, and the device over-
heats.
22. Define kilowatt hour 1 kilowatt hour is equal to
1000 W hours. The kilo-
watt hour is the unit that
electrical utilities used to
determine how much en-
ergy their customers have
used during a billing cycle.
23.
, Sltc Final Review
What are the three things needed to produce alternat- Conductor, magnetic field,
ing current? relative motion between
the two
24. What is the difference between positive and negative Positive: away from gen-
when talking about AC voltage? erating station . Negative:
towards generating sta-
tion.
25. What are the three factors that determine the Number of turns in the coil
strength of the voltage produced? of wire. Strength of the
magnetic field. Speed at
which the magnetic lines
of flux pass through the
coil.
26. 7. Define sine wave. A graphical representation
of what is happening to
the voltage in an AC circuit
over a period of time
27. Identify and define the characteristics of AC power Amplitude. Cycles. Fre-
quency. Peak to peak.
RMS.
28. Identify and define the types of Alternating Current Single phase. Three
commonly in use today phase.
29. Define peak-to-peak voltage and rms voltage. Peak to peak is max pos-
itive and max negative.
Rms is standard way of
measuring usable power.
1. 2. Define the law of charges and the law of centrifugal opposites attract and like
force. chargers repel. Centrifu-
gal force a spinning object
will pull away from its cen-
ter point the faster it spins
the greater the force be-
comes.
2. 3. What is a free electron? An electron that has de-
tached from the atom.
3. Identify and define the categories of atoms based Conductor 3 or less. Semi
upon the number of electrons in their valance shell. conductor 4. Insulator 5 or
more.
4. How many basic sources of energy can be used to 6 total and most common
detach electrons? What are they? What are the two magnetism and chemical
most commonly used? reaction
5. Define static electricity. How is it produced? Static means not moving.
Is a charge not a current
produced by friction
6. 7. What is photoelectric effect? When light causes atoms
to release electrons
7. 8. How do batteries work? Chemical reaction
8. 9. Transformers, What are they and how do they work? step up/ step down volt-
age they work by ac
components that make
good use of the induction
process
, Sltc Final Review
9. How does the speed of the conductor passing through when the wire moves
the magnetic field eFect the current produced? faster a larger current is
produced
10. When is an electromagnetic field present, and how Only present when current
does it build and collapse? is flowing
11. Define Induction. Relative motion between a
magnetic field and a con-
ductor that creates a volt-
age in the conductor
12. What are the diFerences between step-up and coils
step-down transformers?
13. 14.What is the diFerence between Alternating current Dc flows in only one di-
and Direct current? rection. Ac reverses direc-
tion as it flows: electrons
flow back and forth con-
tinuously
14. 15.What eFect does voltage have on the overall power Voltage is the driving force
system design? that makes electrons flow
15. 16.Define the terms voltage, current, resistance, and Voltage, current amount,
power. resistance opposes flow,
power work done
16. 17.What is Ohm's Law? Relationship between cur-
rent voltage and resis-
tance
17. 18.What aFects the resistance of a conductor?
, Sltc Final Review
Material, length, size of
cross section
18. 19.What is represented by the letters E, I, R, P? E-voltage I-current R-re-
sistance (ohms) p-power
(watts)
19. 20.Define the term joule. The unit of electrical work
20. 1. Define Power and how it is measured. Power is defined as the
rate at which work is
done. In an electrical cir-
cuit, power is calculated by
multiplying voltage times
current.
21. Why are power ratings important? If an electrical device is
operated so that it re-
ceives more power than
it is rated for, the ex-
cess power is converted to
heat, and the device over-
heats.
22. Define kilowatt hour 1 kilowatt hour is equal to
1000 W hours. The kilo-
watt hour is the unit that
electrical utilities used to
determine how much en-
ergy their customers have
used during a billing cycle.
23.
, Sltc Final Review
What are the three things needed to produce alternat- Conductor, magnetic field,
ing current? relative motion between
the two
24. What is the difference between positive and negative Positive: away from gen-
when talking about AC voltage? erating station . Negative:
towards generating sta-
tion.
25. What are the three factors that determine the Number of turns in the coil
strength of the voltage produced? of wire. Strength of the
magnetic field. Speed at
which the magnetic lines
of flux pass through the
coil.
26. 7. Define sine wave. A graphical representation
of what is happening to
the voltage in an AC circuit
over a period of time
27. Identify and define the characteristics of AC power Amplitude. Cycles. Fre-
quency. Peak to peak.
RMS.
28. Identify and define the types of Alternating Current Single phase. Three
commonly in use today phase.
29. Define peak-to-peak voltage and rms voltage. Peak to peak is max pos-
itive and max negative.
Rms is standard way of
measuring usable power.
