OCR Cambridge Electronic Programmable Systems GCSE
Study online at https://quizlet.com/_hfdbou
1. Unit for Potential Volt (V)
difference
2. Unit for Current Amp (A)
3. Ohms Law V= IR
4. What is resis- Resistance is the opposition to the flow of current
tance?
5. What is current? The flow of electrons around an electronic circuit
6. What is Potential The difference in electrical potential between two points in a circuit
Difference (volt-
age)
7. Unit for Capaci- Farad (F)
tance
8. Unit for Power Watts (W)
9. Unit for Frequen- Hertz (Hz)
cy
10. Watts law P= IV
11. Equation for Fre- Frequency = 1/time period
quency
12. What is capaci- The ability for a component to store electrical charge
tance?
13. What is power? the rate electricity is transferred by a circuit
14. The amount of waves that pass a certain point over a set amount of time
, OCR Cambridge Electronic Programmable Systems GCSE
Study online at https://quizlet.com/_hfdbou
What is frequen-
cy?
15. Multiple Factor: 10^6
Mega (M)
16. Multiple Factor: 10^3
Kilo (k)
17. Submultiple Fac- 10^-3
tor: Milli (m)
18. Submultiple Fac- 10^-6
tor: Micro (μ)
19. Submultiple Fac- 10^-9
tor: nano (n)
20. Submultiple Fac- 10^-12
tor: Pico (p)
21. What are the two Series Circuit:
types of circuit Arranged using a single chain of components
arrangements?
Parallel circuit:
Arranged using loops of components
22. How do you cal- R_total = R1 + R2 + R3
culate total resis-
tance: Series
23. How do you cal- 1/R_total = 1/R1 + 1/R2 + 1/R3
culate total resis-
tance: Parallel
, OCR Cambridge Electronic Programmable Systems GCSE
Study online at https://quizlet.com/_hfdbou
24. Analogue signal: Send information as a set of continuous values. Shown as sinusoidal wave forms
What do they do?
E.G: Light and Temperature levels
25. Digital signal: Send informaton as a series of discrete values, such as 0 and 1. Shown as a square
What do they do? wave form.
E.G: Logic signals and digital audio signals
26. Advantages: ana- More accurate than digital signals
logue signals Give a truer representation of the signal
27. disadvantages: They often suffer from noise and distortion
analogue signals They are lower quality than Digital signals
28. Advantages: Dig- Less noise and distortion
ital signals They are more flexible and secure than analogue
29. disadvantages: They only use a finite number of values
Digital signals They only represent a sample of the original signal
30. AC Alternating current: Changes the direction periodically. it is used for long-distance
power transmission as there is very little heat loss
31. DC Direct Current: Only flows in one single direction. Is much easier to store than AC
32. What does a A block diagram gives a top-down overview of a system
block diagram
do?
33. What is the or- Input -> Process -> Output
der of a block di-
agram?
Study online at https://quizlet.com/_hfdbou
1. Unit for Potential Volt (V)
difference
2. Unit for Current Amp (A)
3. Ohms Law V= IR
4. What is resis- Resistance is the opposition to the flow of current
tance?
5. What is current? The flow of electrons around an electronic circuit
6. What is Potential The difference in electrical potential between two points in a circuit
Difference (volt-
age)
7. Unit for Capaci- Farad (F)
tance
8. Unit for Power Watts (W)
9. Unit for Frequen- Hertz (Hz)
cy
10. Watts law P= IV
11. Equation for Fre- Frequency = 1/time period
quency
12. What is capaci- The ability for a component to store electrical charge
tance?
13. What is power? the rate electricity is transferred by a circuit
14. The amount of waves that pass a certain point over a set amount of time
, OCR Cambridge Electronic Programmable Systems GCSE
Study online at https://quizlet.com/_hfdbou
What is frequen-
cy?
15. Multiple Factor: 10^6
Mega (M)
16. Multiple Factor: 10^3
Kilo (k)
17. Submultiple Fac- 10^-3
tor: Milli (m)
18. Submultiple Fac- 10^-6
tor: Micro (μ)
19. Submultiple Fac- 10^-9
tor: nano (n)
20. Submultiple Fac- 10^-12
tor: Pico (p)
21. What are the two Series Circuit:
types of circuit Arranged using a single chain of components
arrangements?
Parallel circuit:
Arranged using loops of components
22. How do you cal- R_total = R1 + R2 + R3
culate total resis-
tance: Series
23. How do you cal- 1/R_total = 1/R1 + 1/R2 + 1/R3
culate total resis-
tance: Parallel
, OCR Cambridge Electronic Programmable Systems GCSE
Study online at https://quizlet.com/_hfdbou
24. Analogue signal: Send information as a set of continuous values. Shown as sinusoidal wave forms
What do they do?
E.G: Light and Temperature levels
25. Digital signal: Send informaton as a series of discrete values, such as 0 and 1. Shown as a square
What do they do? wave form.
E.G: Logic signals and digital audio signals
26. Advantages: ana- More accurate than digital signals
logue signals Give a truer representation of the signal
27. disadvantages: They often suffer from noise and distortion
analogue signals They are lower quality than Digital signals
28. Advantages: Dig- Less noise and distortion
ital signals They are more flexible and secure than analogue
29. disadvantages: They only use a finite number of values
Digital signals They only represent a sample of the original signal
30. AC Alternating current: Changes the direction periodically. it is used for long-distance
power transmission as there is very little heat loss
31. DC Direct Current: Only flows in one single direction. Is much easier to store than AC
32. What does a A block diagram gives a top-down overview of a system
block diagram
do?
33. What is the or- Input -> Process -> Output
der of a block di-
agram?
