Which part of a D.C motor reverses the direction of current through the coil every half-cycle...? Mcqs

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Which part of a D.C motor reverses the direction of current through the coil every half-cycle...?

(A) The armature
(B) The commutator

(C) The brushes
(D) The slip rings

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Why does cytosine not form a bond with adenine...?

(A) Cytosine is unable to form hydrogen bonds with adenine.
(B) Adenine and cytosine have incompatible hydrogen bond donors and acceptors.

(C) Cytosine only pairs with thymine due to their complementary structures.
(D) Adenine is a pyrimidine and cannot bond with cytosine.

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The germination (bean seed) in which the cotyledons comes above the ground...?

(A) Hypogeal Germination
(B) Micropyle Germination

(C) Testa Germination
(D) Epigeal Germination

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The average kinetic energy of the molecules of a body determines...?

(A) heat
(B) temperature

(C) internal energy
(D) none

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How many teeth does a dog have...?

(A) 42
(B) 45

(C) 46
(D) 47

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DNA is _____________...?

(A) Acetic Acid
(B) A class of nucleic acids

(C) Citric Acid
(D) None of these

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From among the following, which material is insoluble in water...?

(A) Sand
(B) Sugar

(C) Glucose
(D) Salt

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Which is the largest gland in the human body...?

(A) Thyroid
(B) Liver

(C) Pancreas
(D) None of these

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The matter of our sun is in ________ state...?

(A) Liquid
(B) Gas

(C) Solid
(D) Plasma

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The tendency of the object to remain at rest or, if moving, to continue its uniform motion in a straight line is called...?

(A) Inertia
(B) Momentum

(C) Friction
(D) Gravity

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