Which of the following is the main difference between electromagnets and bar magnets...? Mcqs

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Which of the following is the main difference between electromagnets and bar magnets...?

(A) Electromagnets are stronger than bar magnets
(B) Bar magnets are permanent, but electromagnets are temporary

(C) Electromagnets are used in motors, but bar magnets are used in generators
(D) Electromagnets need electricity but bar magnets do not need electricity

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Which statement is incorrect about particles in solids...?

(A) Particles are in loose clusters
(B) Particles are closely packed

(C) Particles are in regular pattern
(D) Particles have small spaces between them

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The small segment of DNA which has information to code one protein is called ______...?

(A) Nucleotide
(B) Polynucleotide

(C) Gene
(D) Exon

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Skin is _____ thick...?

(A) 2mm
(B) 2cm

(C) 3mm
(D) 3cm

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Salt dissolution in water, actually represents solute and solvent combination of _____...?

(A) Solid liquid solution
(B) Solid solid solution

(C) Liquid liquid solution
(D) Gas liquid solution

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Transistors do not need a warm up period because they have no ...?

(A) Plate
(B) Grid

(C) Filament
(D) None of above

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Ozone layer thickness is measured in____________...?

(A) Metre
(B) Joule

(C) Pounds
(D) Dobson

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Aeroplanes fly in ______...?

(A) Troposphere
(B) Stratosphere

(C) Mesosphere
(D) Thermosphere

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The sunlight can reach a depth of___________meters in the ocean...?

(A) 80
(B) 200

(C) 120
(D) None

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In eye donation, which one of the following parts of donor’s eye is utilized ...?

(A) Iris
(B) Lens

(C) Cornea
(D) Retina

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