The scientist who first sent electromagnetic waves to distant places is...? Mcqs

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The scientist who first sent electromagnetic waves to distant places is...?

(A) James Clerk Maxwell
(B) Heinrich Hertz

(C) Thomas Alva Edison
(D) John Logie Baird

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Mouna Loa is an example of...?

(A) Active volcano
(B) Extinct volcano

(C) Plateau in volcanic region
(D) None of these

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Gravitational force is always ______...?

(A) Repulsive
(B) Attractive

(C) Both
(D) None of these

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Water is a...?

(A) Compound
(B) Mixture

(C) Solution
(D) Element

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Loss of internal water of plant in the form of vapours from aerial parts of plants is called...?

(A) Evaporation
(B) Respiration

(C) Transpiration
(D) Photosynthesis

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Who is the founder of solar system...?

(A) Copernicus
(B) Newton

(C) Galileo
(D) Kepler

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Girl is riding a bicycle. She covers a distance of 150 meters is 5 seconds. The cycling speed of a girl is...?

(A) 20 m/s
(B) 30 m/s

(C) 40 m/s
(D) 50 m/s

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“Gastric juice” is a secretion of the glands present in________...?

(A) Gall Bladder
(B) Kidneys

(C) Stomach
(D) None of these

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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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Periscope is another optical instrument that works on the principle of total ____...?

(A) Refraction
(B) Diffraction

(C) External Reflection
(D) Internal Reflection

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