Which input device uses Hall effect sensors? MCQ with Answer and Explanation

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Which input device uses Hall effect sensors?

A. Optical mice

B. Monitors

C. Some mechanical keyboards for durability

D. Scanners

Answer: Option C

Solution (By JKSSB Mock Tests)

Contactless switching.

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Question #1

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The standard paper size for most printers is:

A. Letter only

B. A3

C. Legal

D. A4

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Correct Answer: Option D

Explanation:
A4 is the international standard.

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Question #2

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What is the primary sensor in most flatbed scanners?

A. Thermal

B. CCD or CIS

C. Magnetic

D. CMOS only for phones

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Correct Answer: Option B

Explanation:
Charge Coupled Device or Contact Image Sensor.

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Question #3

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A common resolution for HD monitors is:

A. 2560x1440

B. 4096x2160

C. 800x600

D. 1366x768

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Correct Answer: Option D

Explanation:
1366x768 is common for HD laptops.

This question belongs to: Computer Computer Hardware

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