Analog Electronics Unplugged: Signals and Systems Basics Quiz Quiz

1. Identifying Analog Signals

   Which of the following is an example of an analog signal?

   1. A sound wave from a human voice
   2. A series of 0s and 1s
   3. Morse code transmitted via light
   4. A blinking LED
   5. A barcode on a product

2. Continuous vs. Discrete

   What characterizes a continuous-time (analog) signal?

   1. It can take on any value at any time
   2. It consists of only two levels
   3. It is always periodic
   4. It changes only at specific intervals
   5. It is only generated by computers

3. Sinusoidal Waveforms

   A sine wave voltage with amplitude 5V is an example of which type of signal?

   1. Periodic analog signal
   2. Digital pulse
   3. Triangular signal
   4. Random noise
   5. Static signal

4. Amplitude Definition

   In an analog signal, what does 'amplitude' refer to?

   1. The maximum value of the signal's waveform
   2. The speed of transmission
   3. The sequence of binary digits
   4. The number of cycles per second
   5. The type of sensor used

5. Frequency Measurement

   If a signal completes 100 cycles in one second, what is its frequency?

   1. 100 Hz
   2. 1 kHz
   3. 10 Hz
   4. 0.1 Hz
   5. 1000 Hz

6. System Input and Output

   In analog electronics, what is the role of a 'system'?

   1. To process input signals and produce output signals
   2. To store numeric data as files
   3. To convert chips into resistors
   4. To arrange wires without signals
   5. To measure atmospheric pressure

7. Noise in Analog Signals

   What is one common effect of 'noise' in an analog signal transmission?

   1. Unwanted variations or distortion in the signal
   2. Increased storage capacity
   3. Perfect reproduction of the source
   4. Conversion to a digital signal
   5. Higher display resolution

8. Linear System Property

   Which statement best describes a 'linear system'?

   1. The output is directly proportional to the input
   2. The output is always zero
   3. The signal decreases exponentially
   4. The frequency stays at 0 Hz
   5. The circuit always amplifies noise

9. Time-Invariant System

   If an analog system gives the same output for an input regardless of when the input is applied, what property does it have?

   1. Time-invariance
   2. High oscillation
   3. Non-linear distortion
   4. Periodic switching
   5. Voltage clamping

10. Signal Superposition

    According to the superposition principle, what happens if two signals are input into a linear system simultaneously?

    1. The output is the sum of the system's responses to each signal separately
    2. The system only processes the first signal
    3. Signals cancel each other
    4. All output frequencies become zero
    5. Noise becomes the dominant output