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What can social media help you with?
What can social media help you with?
What is one of the demerits of social media?
What is one of the demerits of social media?
What is cyber bullying an example of?
What is cyber bullying an example of?
What can be spread on social media platforms?
What can be spread on social media platforms?
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What can be a consequence of blackmailing on social media?
What can be a consequence of blackmailing on social media?
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What is lacking in social media connections?
What is lacking in social media connections?
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What is the author's conclusion about everything?
What is the author's conclusion about everything?
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What does the author compare everything to?
What does the author compare everything to?
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What does the author suggest we should do?
What does the author suggest we should do?
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What is the author's perspective on humans?
What is the author's perspective on humans?
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Study Notes
Analog Instruments
- Analog instruments are devices that measure physical quantities, such as pressure, voltage, and current, and display the output in a continuous signal.
- These instruments are extensively used in various applications, including engineering, physics, and chemistry.
Classification of Analog Instruments
- Analog instruments can be classified into three types based on their function:
- Indicating instruments: These instruments measure the magnitude of a quantity and display the output using a dial and a pointer. Examples include voltmeters, ammeters, and wattmeters.
- Recording instruments: These instruments record the variations of a quantity over a specific period. Examples include recording voltmeters and oscilloscopes.
- Integrating instruments: These instruments totalize events over a specific period. Examples include ampere-hour meters and watt-hour meters.
Deflection, Controlling, and Damping Torques
- Deflection torque: The torque required to deflect the pointer of an instrument to a specific position. It is produced by the deflecting system.
- Controlling torque: The torque that opposes the deflection torque and brings the pointer back to its zero position. It is produced by the controlling system.
- Damping torque: The torque that reduces the oscillations of the pointer and helps it to settle quickly. It is produced by the damping system.
Effects Used to Produce Deflecting Torque
- Magnetic effect: Used in most ammeters, voltmeters, and wattmeters. It produces a deflecting torque by using a magnetic field.
- Electromagnetic induction effect: Used in voltmeters, ammeters, and energy meters. It produces a deflecting torque by using electromagnetic induction.
- Heating effect: Used in thermal instruments. It produces a deflecting torque by using the heat generated by the current.
- Chemical effect: Used in integrating instruments. It produces a deflecting torque by using a chemical reaction.
- Electrostatic effect: Used in electrostatic instruments. It produces a deflecting torque by using an electrostatic field.
Torque to Weight Ratio (T/W Ratio)
- The T/W ratio is an important factor in instrument design. It is the ratio of the deflecting torque to the frictional torque.
- A higher T/W ratio indicates a more sensitive instrument.
Analog Voltmeters and Ammeters
- Analog voltmeters measure voltage and display the output using a needle.
- Analog ammeters measure current and display the output using a needle.
- Both types of instruments use a moving coil or a moving iron to measure the quantity.
Comparison with Digital Instruments
- Analog instruments have some advantages over digital instruments, such as:
- Providing a better idea of the order of magnitude and trends.
- Not requiring a power supply beyond the test current source.
- However, digital instruments have generally superseded analog instruments due to their superior accuracy and precision.
Scale and Range
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Analog instruments have a scale and range that is determined by the instrument's design.
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The scale and range can be altered by providing a shunt coil or a multiplier.### Merits and Demerits
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Merits refer to favorable circumstances, means, or opportunities that contribute to the success of a desired end.
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Merits also describe the respectable qualities of a thing that make it worthy of respect and praise.
Demerits
- Demerits refer to the marks or characteristics of a thing that are deficient or misconduct.
- Demerits hamper the respect a thing has gained through its merits.
Difference between Merits and Demerits
- Merits are favorable to success, while demerits are unfavorable and have adverse effects.
- Merits refer to advantages or favorable significance, while demerits refer to unfavorable points.
Importance of Considering Merits and Demerits
- When evaluating a thing, it is essential to consider both merits and demerits to make an informed decision.
Examples of Merits and Demerits
Merits of Social Media
- Social media provides a wide social and mental platform for expression.
- It helps small businesses with marketing strategies.
- Social media is beneficial for educational purposes, especially during pandemic times.
- It can aid in job searches and provide opportunities to connect with entrepreneurs.
- Online profiles on LinkedIn help individuals connect with notable entrepreneurs.
Demerits of Social Media
- Oversharing on social media can lead to privacy problems.
- Cyberbullying is a significant disadvantage of social media.
- Social media platforms can spread misinformation.
- Blackmailing and releasing intimate videos on social media can harm reputations.
- Social media lacks the basic essence of mental and emotional connections between people.
- Not everyone is genuine on social media platforms, and it can be misleading.
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Description
Learn about analog instruments, their applications, and classification into different types. Understand their role in measuring physical quantities and displaying continuous signals.
