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A. Low Energy Device
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B. Light Emitting Diode
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C. Laser Emitting Device
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D. Liquid Emitting Display
Explanation
A Light Emitting Diode (LED)
A light-emitting diode is a semiconductor device that emits light when current flows through it
LED lighting products produce light up to 90%
***
Invented:
H. J. Round (1907);
Oleg Losev (1927);
James R. Biard (1961);
Nick Holonyak (1962)
***
First production: October 1962
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VU FIA CBT 14-12-2021
ND5-5-2023
فوٹو فوبیا _____ کا خوف ہے؟
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A. Dogs
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B. None of these
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C. Light
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D. Wealth
Explanation
Photophobia refers to an extreme sensitivity or fear of light.
It often causing discomfort or pain in the eyes.
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A. Optical output device
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B. Electronic input device
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C. Mechanical Input device
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D. Optical input device
Explanation
Light pen is an optical input device.
A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's cathode-ray tube (CRT) display.
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A. Modest: average
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B. Small: tiny
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C. Fat: heavy
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D. Little: big
Explanation
Dark means اندھیرا
Light means روشنی
Little means چھوٹا
Big means بڑا
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A. Analog Signal
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B. Digital Signal
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C. None of these
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D. Noise Signal
Explanation
Light varies continuously in intensity and wavelength, making it an analog signal.
Analog signals have values that change smoothly over time — just like natural light.
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A. a person who is a good artist
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B. a person who is soft and tender
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C. a person whose handwriting is good
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D. a person who is a thief
Explanation
Light-fingered person (چور، چالاک چور)
A person who is a thief (وہ شخص جو چور ہو)
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A. Despising
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B. Support
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C. Cheerful
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D. Worthy
Explanation
Buoyant synonym
cheerful
cheery
happy
light-hearted
carefree
bright
glad
merry
joyful
bubbly
bouncy
effervescent
blithe
sunny
breezy
jolly
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A. dark
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B. clear
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C. brilliant
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D. successful
Explanation
Bright: روشن
Dark: اندھیر
✅ Correct: 0 |
❌ Wrong: 0 |
📊 Total Attempted: 0