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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Which type of reaction produces the most harmful radiation...?

(A) Fusion reaction
(B) Fission reaction

(C) Chemical reaction
(D) Photo-Chemical reaction

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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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The type of mirrors used in the headlamp of cars is ____________...?

(A) Parabolic concave
(B) Plane

(C) Spherical convex
(D) Cylindrical concave

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Plant cell loses water and cytoplasm shrinks in a process called...?

(A) Osmosis
(B) Deplasmolysis

(C) Cytolysis
(D) Plasmolysis

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How many Calories are there in 100 grams Natural Honey...?

(A) 107
(B) 209

(C) 304
(D) 416

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Function of restriction enzymes...?

(A) Join DNA fragments
(B) Cut the DNA

(C) Replicate the DNA
(D) Unwind the DNA

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Year is longest on:___________...?

(A) Jupiter
(B) Earth

(C) Mercury
(D) Mars

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The “Rising” of the “evening star” indicates the direction of the____________...?

(A) South Pole
(B) East

(C) West
(D) North

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Main and excessive part of plasma consists of ________...?

(A) Carbon dioxide
(B) Oxygen

(C) Water
(D) Glucose

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