1
Q
What is an analogue signal?
A
A signal in which frequency, amplitude or both varies continuously.
2
Q
What is a digital signal?
A
A signal varying between two states only high/on and low/off.
3
Q
Give advantages of digital signals
A
- Carry more information per second
- Maintain their quality over long distances
- Noise resistant
4
Q
What is noise?
A
Random variations which disrupt a signal
5
Q
Why is noise a problem for analogue signals?
A
Noise is amplified when the signal is amplified, so the signal quality is reduced.
6
Q
What is a truth table?
A
A diagram showing the corresponding output of all possible inputs into a logic gate.
7
Q
What is the symbol for the AND gate?
A
8
Q
What is the symbol for the OR gate?
A
9
Q
What is the symbol for the NAND gate?
A
10
Q
What is the symbol for the NOR gate?
A
11
Q
What is the symbol for the NOT gate?
A
Physics
flashcards
Decks in class (24)
# Cards
-
Final GCSE Formulas30
-
Topic 1.1 Length and Time7
-
Topic 1.2 - Motion7
-
Topic 1.3 - Mass and Weight5
-
Topic 1.4 - Density5
-
Topic 1.5 - Forces26
-
Topic 1.6 - Momentum4
-
Topic 1.7 - Energy, Work and Power20
-
Topic 1.8 - Pressure7
-
Topic 3.1 - General Wave Properties31
-
Topic 3.2 - Light37
-
Topic 3.3 - Electromagnetic Spectrum21
-
Topic 3.4 Sound16
-
Extra20
-
Important13
-
Topic 4.1 - The simple phenomena of magnetism20
-
Topic 4.2 - Electrical Quantities31
-
Topic 4.3 - Electric Circuits21
-
Topic 4.4 - Digital Electronics11
-
Topic 4.5 - Dangers of Electricity9
-
Topic 4.6 - Electromagnetic Effects23
-
The GATES5
-
Topic 5.2 - Radioactivity31
-
Topic 5.1 - The Nuclear Atom12
