Why is the binary number system well-suited for computers?

It directly represents the on/off states of electronic switches.

What is the relationship between the decimal, binary, and hexadecimal number systems?

They are all positional number systems.

Why does converting a number from a higher base to a lower base often result in a longer representation?

The digits in the lower base represent smaller values.

Why is hexadecimal often used in computer science?

It is more compact than binary for representing memory addresses.

How does the concept of place value apply across different number systems?

The place value is determined by the base of the number system.

Why are different number systems used for different purposes (e.g., decimal for everyday life, binary for computers)?

Different systems are better suited to different tasks based on their properties (e.g., ease of human understanding vs. direct representation of electronic states).

Compare and contrast the advantages and disadvantages of using binary versus hexadecimal in computer programming.

Binary is more compact, while hexadecimal is easier for humans to read.

What does a Volt-Ohm-Meter (VOM) primarily measure?

Voltage, current, and resistance

Explain the difference between measuring voltage and measuring current using a VOM. What precautions are necessary for each?

Voltage is measured in parallel; current is measured in series. Voltage measurement is generally safer.

How does a VOM measure resistance? What is the state of the circuit when measuring resistance?

By applying a known current and measuring the resulting voltage. The circuit must be off and disconnected from any power source.

Why is it important to zero the VOM before taking resistance measurements?

To account for the internal resistance of the meter.

Steps to measure voltage across a resistor using a VOM, including safety precautions.

Turn the circuit off, set the VOM to the appropriate voltage range, connect the probes in parallel across the resistor.

Steps to measure current through a resistor using a VOM, including safety precautions.

Turn the circuit off, set the VOM to the appropriate current range, connect the probes in series with the resistor.

Possible sources of error when measuring the resistance of a resistor and how to minimize them?

Poor connection of the probes, incorrect range selection, and faulty meter.

Compare and contrast analog and digital VOMs. What are the advantages and disadvantages of each?

Analog VOMs provide a continuous visual indication of the measurement, while digital VOMs provide a precise numerical reading. Analog is generally less expensive but can be less precise.

How would you assess the validity of a technician's troubleshooting process if VOM readings are inconsistent and unreliable?

The process is invalid due to unreliable readings; recalibration of the VOM and double-checking connections are necessary.

In a series circuit, how to compute the total resistance?

The sum of the individual resistances.

In a parallel circuit, how to compute the total current?

The sum of the individual currents.

Why is the total resistance in a parallel circuit always less than the smallest individual resistance?

Because the current has multiple paths to flow through.

How does adding more resistors in series affect the total resistance and current of a circuit?

Total resistance increases, and total current decreases.

Explain why the voltage is the same across all branches in a parallel circuit.

Because the branches are connected directly to the voltage source.

How to calculate the total resistance of a complex circuit with series and parallel components?

By simplifying the circuit step by step, combining series and parallel components until a single equivalent resistance is obtained.

Third Quarter Electronics reviewer Flashcards

Student preview

38 questions

Show all answers

1.

FLASHCARD QUESTION

Front

Which of the following is NOT a common number system? Decimal (base-10), Binary (base-2), Hexadecimal (base-16), Septimal (base-7)

Back

Septimal (base-7)

2.

FLASHCARD QUESTION

Front

What is the base of the decimal number system?

Back

10

3.

FLASHCARD QUESTION

Front

In the binary number system, what are the only digits used?

Back

0 and 1

4.

FLASHCARD QUESTION

Front

What is the largest digit used in the hexadecimal number system?

Back

F (fifteen)

5.

FLASHCARD QUESTION

Front

How many bits are in a byte?

Back

8

6.

FLASHCARD QUESTION

Front

What does the subscript in a number (e.g., 101₂ ) indicate?

Back

The base of the number system.

7.

FLASHCARD QUESTION

Front

Which number system is commonly used in computer programming?

Back

Binary

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