chapter 1 Flashcards
(37 cards)
What is a system?
is a group of interrelated parts that perform a specific function.
Copyright © 2014 by Pearson Education, Inc. All Rights Reserved Electronics Fundamentals: A Systems Approach, First Edition, Thomas L. Floyd | David M. Buchla Ch.1 Summary
How does a system communicate with the outside world?
A system communicates with the outside world via its inputs and outputs.
Copyright © 2014 by Pearson Education, Inc. All Rights Reserved Electronics Fundamentals: A Systems Approach, First Edition, Thomas L. Floyd | David M. Buchla Ch.1 Summary
What is an input in an electrical circuit?
An input is the voltage, current or power that is applied to an electrical circuit to achieve a desired result.
Copyright © 2014 by Pearson Education, Inc. All Rights Reserved Electronics Fundamentals: A Systems Approach, First Edition, Thomas L. Floyd | David M. Buchla Ch.1 Summary
What is an output in a system?
whatever happens after the system process its input(s).
What does an electrical system deal with?
deals with electric power.
What does an electronic system deal with?
An electronic system deals with signals; changing electrical or electromagnetic quantities that carry information.
Copyright © 2014 by Pearson Education, Inc. All Rights Reserved Electronics Fundamentals: A Systems Approach, First Edition, Thomas L. Floyd | David M. Buchla Ch.1 Summary
What is a block diagram?
shows the main blocks of a system and their relationships
What is a closed circuit?
A circuit that forms a complete loop is called a closed circuit.
Copyright © 2014 by Pearson Education, Inc. All Rights Reserved Electronics Fundamentals: A Systems Approach, First Edition, Thomas L. Floyd | David M. Buchla Ch.1 Summary
What is an open circuit?
A circuit that does not form a complete loop
How are very large and very small numbers represented?
Very large and very small numbers are represented with scientific and engineering notation.
Copyright © 2014 by Pearson Education, Inc. All Rights Reserved Electronics Fundamentals: A Systems Approach, First Edition, Thomas L. Floyd | David M. Buchla Ch.1 Summary
What are some important electrical units?
Some important electrical units include current (Ampere), charge (Coulomb), voltage (Volt), resistance (Ohm), and power (Watt).
Copyright © 2014 by Pearson Education, Inc. All Rights Reserved Electronics Fundamentals: A Systems Approach, First Edition, Thomas L. Floyd | David M. Buchla Ch.1 Summary
What is a fundamental unit?
Current is a fundamental unit.
These derived units are based on fundamental units from the meter-kilogram-second system and are called mks units.
Name the important electrical units and their symbols.
Current - Ampere (A)
Charge - Coulomb (C)
Voltage - Volt (V)
Resistance - Ohm (Ω)
Power - Watt (W)
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What are the engineering metric prefixes for large numbers (>1) and their meanings?
Milli - 10^-3
Micro - 10^-6
Nano - 10^-9
Pico - 10^-12
Femto - 10^-15
Can you name these engineering metric prefixes and their meaning?
What are the engineering metric prefixes for small numbers (<1) and their meanings?
Peta
Tera
Giga
Mega
Kilo
1015
1012
109
106
103
What is the rule for converting from a smaller unit to a larger unit?
move the decimal point to the right. Remember, a smaller unit means the number must be larger.
0.47 MW = 470 kW
What is the rule for converting from a larger unit to a smaller unit?
When converting from one unit to a larger unit, move the decimal point to the left. Remember, a larger unit means the number must be smaller.
10,000 pF = 0.01 mF
What is the rule for adding or subtracting numbers with metric prefixes?
When adding or subtracting numbers with a metric prefix, convert them to the same prefix first.
10,000 W + 22 kW =
10,000 W + 22,000 W = 32,000 W
Alternatively:
10 kW + 22 kW = 32 kW
What is the rule for adding or subtracting numbers with different metric prefixes?
convert them to the same prefix first.
200 mA + 1.0 mA =
200 mA + 1,000 mA = 1200 mA
Alternatively:
0.200 mA + 1.0 mA = 1.2 mA
What is error in measurements?
Error - Precise, but not correct .
When is a digit considered significant?
it has no “0”
When is a digit considered significant?
Non-zero digits are always considered to be significant.
Example: 23.92 has four non-zero digits - they are all significant.
What are the rules for determining significant digits?
- Non-zero digits are always considered to be significant.
- Zeros between nonzero digits are always significant.
- Zeros to the right of the decimal point for a decimal number are significant.
- Zeros to the left of the decimal point with a whole number may or may not be significant depending on the measurement.
Example: 0.00276 has three zeros to the left of the first non-zero digit. There are only three significant digits.
What are the rules for rounding numbers?
- If the dropped digit is greater than 5, increase the last retained digit by 1.
- If the dropped digit is less than 5, do not change the last retained digit.
- If the dropped digit is 5, increase the last retained digit if it makes it even, otherwise do not. This is called the ‘round-to-even’ rule.
