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# Electrical Signals and Cathode Ray Oscilloscope (CRO) Basics

Created by
@EffectualMaple

### What is the purpose of the TIME/DIV switch in combination with the S/Ms control?

• To select the time coefficients for the signal (correct)
• To measure the phase shift of the signal
• To adjust the amplitude of the signal
• To change the frequency of the signal
• ### What is the function of the MAGN xn control?

• To adjust the vertical deflection of the trace
• To measure the frequency of the signal
• To change the time base of the signal
• To magnify the horizontal deflection by a factor of n (correct)
• ### What is the purpose of the CAL knob?

• To take readings from the oscilloscope (correct)
• To adjust the amplitude of the signal
• To change the frequency of the signal
• To measure the phase shift of the signal
• ### What is the purpose of the NORM/TV switch?

<p>To obtain normal triggering or TV line/frame synchronization</p> Signup and view all the answers

### What is the purpose of the INT/EXT switch?

<p>To provide an external triggering signal for the timer-base</p> Signup and view all the answers

### What is the purpose of the experiment described in the Engineering Physics Lab Manual?

<p>To study the functions of a cathode ray oscilloscope</p> Signup and view all the answers

### What is the primary function of a Cathode Ray Oscilloscope (CRO)?

<p>To display the visual representation of electrical signals</p> Signup and view all the answers

### What does the X-axis represent on a Cathode Ray Oscilloscope?

<p>Time</p> Signup and view all the answers

### What is the purpose of the FOCUS knob on a Cathode Ray Oscilloscope?

<p>To make the beam sharply defined</p> Signup and view all the answers

### What happens to the DC component of the signal when the AC/DC switch is in the AC position?

<p>It is blocked by a blocking capacitor</p> Signup and view all the answers

### What is the function of the horizontal deflection plates in a Cathode Ray Oscilloscope?

<p>To deflect the electron beam horizontally</p> Signup and view all the answers

### What is the range of the AMP/DIV knob on a Cathode Ray Oscilloscope?

<p>2mv/div to 10v/div</p> Signup and view all the answers

## Study Notes

### Cathode Ray Oscilloscope (CRO)

• A CRO is an instrument that provides a visual representation of electrical signals, displaying them on a screen with X-axis representing time and Y-axis representing amplitude.
• The cathode ray tube is the heart of a CRO, generating a narrow electron beam that falls on a fluorescent screen.
• The electron beam is deflected horizontally and vertically by horizontal and vertical deflection plates respectively.

### Controls and Functions

• TIME BASE and HORIZONTAL DEFLECTION X-POSITION: controls horizontal shifting of the trace
• LEVEL: helps signal remain still
• S/Ms: selects time coefficients with TIME/DIV switch
• MAGN xn: allows magnification of horizontal deflection by a factor of n
• X A: determines horizontal deflection based on input signal to channel A
• CAL Knob: turns to CAL position for taking readings
• INT/EXT: allows external triggering signal for timer-base through EXT socket
• NORM/TV: selects triggering type (normal or TV line/frame synchronization)

### Apparatus and Experiment

• Apparatus: CRO, Function generator, and probes
• Experiment: measures frequency of a signal and amplitude of a given wave
• Measure current, frequency, and inductance using the apparatus

### Resonance Frequency and Series Resonance

• Measure resonance frequency (fr) when current reaches maximum value (Imax)
• Evaluate inductance (L) in henry using the equation
• Record values of R, C, and fr in a table for series resonance

### Power and Output

• Calculate power in each trial and find the maximum power point
• Note the corresponding current and output power

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## Description

This quiz covers the fundamentals of cathode ray oscilloscopes (CRO), their functionality, and their role in studying electrical signals. Learn about the graphical representation of electrical signals and how CROs display voltage variations. Test your knowledge of CROs and their applications in electronics.

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