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This examination will asses the learner's knowledge and understanding of the topic Read Head and Sensor and will provide certification upon completion.

• 1.

### Is a key element in read head to sense media signal by resistance change:

• A.

A. magnetic sensor

• B.

B. media sensor

• C.

• D.

D. TMR sensor

Explanation
The correct answer is c. read sensor. A read sensor is a key element in a read head that is responsible for sensing the media signal by detecting resistance changes. It is specifically designed to read and interpret the data stored on the media, such as a hard disk or magnetic tape. Other options like magnetic sensor, media sensor, and TMR sensor may have different functions but are not specifically designed for this purpose.

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• 2.

### A type of sensor with characteristic of ΔR/R 20-150% => ADC > 1 Tb/in²:

• A.

A. AMR

• B.

B. TMR

• C.

C. GMR

B. B. TMR
Explanation
TMR stands for Tunneling Magnetoresistance, which is a type of sensor that has a characteristic of Î”R/R 20-150%. This means that the change in resistance (Î”R) divided by the initial resistance (R) can range from 20% to 150%. The answer choice b. TMR fits this description, making it the correct answer.

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• 3.

### Soft side shield advantage are:

• A.

A. narrow ÂµMRW and less side reading

• B.

B. uniform biasing and ASYM sigma reduction

• C.

C. LS2 pinning adds stabilization to biasing self recov

• D.

D. All of the above

D. D. All of the above
Explanation
The correct answer is d. All of the above. This means that all of the advantages mentioned in options a, b, and c are applicable to soft side shields. These advantages include a narrow ÂµMRW (micro magnetic recording width) and less side reading, uniform biasing, ASYM (asymmetric) sigma reduction, and stabilization of biasing through LS2 pinning. Soft side shields offer these benefits, making them a preferable option.

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• 4.

### It is a longest wide material use in barrier for read head generation:

• A.

A. MgO

• B.

B. FeO

• C.

C. SnO

• D.

D. NiO

A. A. MgO
Explanation
MgO is the correct answer because it is a widely used material in barrier for read head generation. MgO, or magnesium oxide, has excellent electrical and magnetic properties, making it suitable for use in read heads. It is known for its high electrical insulation, thermal stability, and low magnetic moment, which are important characteristics in barrier materials for read heads. MgO also has a high melting point and good chemical stability, making it a durable and reliable choice for this application.

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• 5.

### IBM commercialized first GMR head in what year?:

• A.

A. 1999

• B.

B. 1997

• C.

C. 1990

• D.

D. 2000

B. B. 1997
Explanation
IBM commercialized the first GMR head in 1997. GMR (Giant Magnetoresistance) technology revolutionized the data storage industry by allowing for higher storage densities and improved performance in hard disk drives. By utilizing the GMR effect, IBM was able to develop a more sensitive and accurate read/write head for their hard drives. This advancement in technology played a crucial role in the development of smaller and more powerful storage devices.

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• 6.

Anelva, Ulvac, Timaris
Explanation

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• 7.

### A type of sensor that has significant RG reduction:

• A.

A. D5 sensor

• B.

B. D3 sensor

• C.

C. E5 sensor

A. A. D5 sensor
Explanation
The D5 sensor is the correct answer because it has significant RG reduction. This means that the D5 sensor is able to effectively reduce the amount of noise and interference in the signal it receives, resulting in a more accurate and reliable measurement. The other options, D3 and E5 sensors, do not have this significant RG reduction capability.

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• 8.

### What is sensor development goal?:

• A.

A. for product performance

• B.

B. for reliability

• C.

C. for margin and manufacturability

• D.

D. for future extendibility

• E.

E. All of the above

E. E. All of the above
Explanation
The sensor development goal encompasses all of the options mentioned. It aims to improve product performance by enhancing the sensor's capabilities. It also focuses on ensuring reliability, so that the sensor consistently provides accurate and consistent data. Additionally, the goal includes considering margin and manufacturability, which involves optimizing the sensor's design and production process to reduce costs and increase efficiency. Lastly, sensor development also aims to enable future extendibility, allowing for potential upgrades and enhancements to be implemented seamlessly.

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• 9.

### Stray field sensitivity is categorized as what interference:

• A.

A. noise

• B.

B. BER

• C.

C. electron

• D.

D. magnetic field

A. A. noise
Explanation
Stray field sensitivity refers to the sensitivity of a device or system to external magnetic fields. These stray fields can interfere with the proper functioning of the device or system, leading to errors or disruptions in the signal. This interference is commonly known as noise, which is any unwanted or random signal that can affect the accuracy or quality of the desired signal. Therefore, the correct categorization for stray field sensitivity is "a. noise."

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• 10.

### AFM stands for what:

Antiferromagnetic material
Explanation
AFM stands for Antiferromagnetic material. Antiferromagnetic materials are substances that exhibit a type of magnetic ordering in which the magnetic moments of neighboring atoms or ions align in opposite directions, resulting in a net magnetization of zero. This phenomenon occurs due to the interaction between the spins of the electrons in the material. Antiferromagnetic materials have unique properties and are used in various applications, such as data storage devices and spintronics.

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• Mar 21, 2023
Quiz Edited by
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• Nov 27, 2017
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