Cathode Ray Oscilloscope Class 10 | 10th class Physics | National Book Foundation | CRO | In Urdu

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Questions related to CRO are below:
What is a Cathode Ray Oscilloscope (CRO)?

A Cathode Ray Oscilloscope (CRO) is a laboratory instrument used to display and analyze the waveform of electrical signals. It provides a graphical representation of voltage changes over time.
Describe the basic components of a CRO and their functions.

The basic components include:
Cathode Ray Tube (CRT): Displays the waveform.
Electron Gun: Emits electrons.
Vertical and Horizontal Deflection Plates: Control the movement of the electron beam.
Time Base Generator: Determines the horizontal sweep rate.
Vertical Amplifier: Amplifies and controls the input signal.
Trigger Circuit: Synchronizes the display with the input signal.
Explain how a cathode ray tube (CRT) works in a CRO.

The CRT emits a focused beam of electrons from the electron gun towards the screen. This beam is deflected vertically and horizontally by the deflection plates according to the input signals. When the beam strikes the phosphorescent coating on the screen, it produces light, creating the waveform display.
What is the purpose of the electron gun in a CRO?

The electron gun emits a beam of electrons, which forms the basis for generating the visual display on the CRT screen.
How is the electron beam deflected in a CRO?

The electron beam is deflected vertically and horizontally by applying varying voltages to the vertical and horizontal deflection plates, respectively.
Discuss the role of the vertical and horizontal deflection plates in a CRO.

The vertical deflection plates control the up and down movement of the electron beam, representing voltage changes. The horizontal deflection plates control the side-to-side movement, representing time.
What is the function of the time base generator in a CRO?

The time base generator determines the horizontal sweep rate, allowing the waveform to be displayed accurately with respect to time.
How are voltage and time measurements performed using a CRO?

Voltage measurements are made by observing the vertical deflection of the waveform, while time measurements are made by observing the horizontal sweep rate controlled by the time base generator.
Describe some common applications of CROs in various fields.

CROs are used in electronics, telecommunications, physics, engineering, and medicine for tasks such as waveform analysis, signal troubleshooting, frequency measurement, and quality control.
Explain the importance of calibrating a CRO and how it is typically done.

Calibration ensures the accuracy of voltage and time measurements. It involves adjusting the settings of the CRO to match known reference signals, usually achieved through built-in calibration controls or external calibration sources.
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