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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A force is a ________ or a _______ that causes movement....?

(A) Pull, Twist
(B) Push, Pull

(C) Push, Lift
(D) Twist, Turn

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Soil acidity is corrected by...?

(A) Proper irrigation
(B) Adding sodium hydroxide

(C) Liming
(D) Application of fertilizers

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Endothermic reactions are those in which ________....?

(A) Heat is evolved
(B) Heat is absorbed

(C) Temperature increases
(D) Light is produced

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A nuclear reactor is a device used to carry out controlled nuclear reaction whereas GM counter is a device used to detect...?

(A) Current
(B) Voltage

(C) Nuclear Radiation
(D) power

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Which bird weighs less than a penny...?

(A) Goldcrest
(B) Weebill

(C) Hummingbird
(D) None of these

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A solution that contain solid solute into liquid solvent is called...?

(A) Solids in gas
(B) Liquids in solids

(C) Solids in solids
(D) Solids in liquid

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As the temperature of ice rises, the ice melts and its density...?

(A) Decreases
(B) Remain constant

(C) Increases
(D) Increases upto 10C

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A process of separating insoluble solids from a mixture is called...?

(A) Crystallization
(B) Filtration

(C) Distillation
(D) Sublimation

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The study of X-rays and their medical applications is called _________ ...?

(A) Radiology
(B) Raciology

(C) Rheumatology
(D) Rheology

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