Light | MCQs

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% 

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Invented:

H. J. Round (1907);

Oleg Losev (1927);

James R. Biard (1961);

Nick Holonyak (1962)

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First production: October 1962

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VU FIA CBT  14-12-2021

ND5-5-2023

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.

Explanation

Dark means اندھیرا

Light means روشنی

Little means چھوٹا

Big means بڑا

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.

Explanation

Light-fingered person (چور، چالاک چور)
 A person who is a thief (وہ شخص جو چور ہو)

Explanation

Buoyant synonym 

cheerful

cheery

happy

light-hearted

carefree

bright

glad

merry

joyful

bubbly

bouncy

effervescent

blithe

sunny

breezy

jolly

Explanation

Bright: روشن 

Dark: اندھیر