on input/output devices.
Flashcard
•
Computers
•
10th Grade
•
Practice Problem
•
Hard
PABLO ALVAREZ
FREE Resource
Student preview
15 questions
Show all answers
1.
FLASHCARD QUESTION
Front
Resistive touchscreens detect input using:
Back
Pressure on layers
Answer explanation
Technical Basis: Two ITO films form a closed circuit when pressed, using voltage gradient measurement for positioning
Exclusion Rationale:
×A - Capacitive screen principle
×C - Acoustic wave screens
×D - Infrared screens
2.
FLASHCARD QUESTION
Front
Can capacitive touchscreens be used with gloves?
Back
False
Answer explanation
Core Mechanism: Relies on human body capacitance coupling (typically 50-100pF)
Key Data: Regular gloves (insulation resistance >10MΩ) block coupling
Exception: Conductive fiber gloves (<1kΩ resistance) work
3.
FLASHCARD QUESTION
Front
Which touchscreen type is more durable for outdoor kiosks?
Back
Resistive
Answer explanation
Comparative Parameters:
Feature Resistive Capacitive
Surface Flexible PET Tempered Glass
Protection IP65 IP54
Temperature -20~70℃ 0~50℃
4.
FLASHCARD QUESTION
Front
A DSLR camera’s mirror reflects light to the: a) Electronic viewfinder b) Optical viewfinder c) LCD screen
Back
Optical viewfinder
Answer explanation
Light Path: Lens → Mirror → Pentaprism → Eyepiece
Note: Electronic viewfinders (EVF) are mirrorless camera features
5.
FLASHCARD QUESTION
Front
Do mirrorless cameras use a pentaprism to direct light?
Back
False
Answer explanation
Key Innovation: Eliminates mirror box (reduces thickness by 15-20mm)
Alternative: Direct sensor readout for electronic viewing
6.
FLASHCARD QUESTION
Front
Smartphone cameras typically use:
Back
CMOS sensors
Answer explanation
Tech Evolution:
Post-2010 CMOS achieved Backside Illumination (BSI) breakthroughs
Read noise improved from 50e⁻ to <1e⁻
7.
FLASHCARD QUESTION
Front
The "f-number" (e.g., f/2.8) controls:
Back
Aperture size
Answer explanation
Formula: Effective aperture diameter = Focal length ÷ f-number
Example: 50mm lens at f/2 has 25mm aperture
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