What is the direction of the magnetic field lines inside a bar magnet...? Mcqs

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What is the direction of the magnetic field lines inside a bar magnet...?

(A) From north pole to south pole
(B) South pole to north pole

(C) From side to side
(D) There are no magnetic field lines

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The critical velocity vc = ______...?

(A) gR
(B) g/R

(C) √gR
(D) √g/R

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SONAR is based on the principle of___________...?

(A) Echo
(B) reverberation

(C) resonance
(D) None of these

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Role of biotechnology in the production of food based on ___________...?

(A) Decomposition
(B) Respiration

(C) Digestion
(D) Fermentation

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Electric motor was invented by __________ ...?

(A) Michael Faraday
(B) Oliver Evans

(C) Thomas Edison
(D) Horace Day

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A six feet tall lady wants to see her full image in a plane mirror . The minimum length of the mirror will be ...?

(A) 6 feet
(B) 12 feet

(C) 4 feet
(D) 3 feet

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Glass is made of the mixture of______________...?

(A) Quartz and Mica
(B) Sand and Salt

(C) Sand and Silicates
(D) None of these

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In context of environment, the term “dirty dozen” refers to _____...?

(A) 12 most harmful greenhouse gases
(B) 12 ozone depleting substances

(C) 12 persistent organic pollutants
(D) None of the above

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The lifespan of Red Blood Cells is __________ days...?

(A) 60
(B) 120

(C) 180
(D) 240

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The life cycle of butterfly is...?

(A) Eggs→caterpillar→pupa→butterfly
(B) Eggs→pupa→caterpillar→butterfly

(C) Eggs→butterfly→caterpillar→pupa
(D) Eggs→caterpillar→butterfly→pupa

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