The process of emission of electrons from the hot metal surfaces is called...? Mcqs

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The process of emission of electrons from the hot metal surfaces is called...?

(A) Plastic emission
(B) Thermionic emission

(C) Static emission
(D) Current emission

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Which of the following explains the reason why there is no total eclipse of the sun...?

(A) Size of the earth in relation to that of moon
(B) Orbit of moon around earth

(C) Direction of rotation of earth around sun
(D) Area of the sun covered by the moon

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Our sun is classified as ...?

(A) A blue giant
(B) Yellow draft

(C) Supernova
(D) None of above

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The device used to convert Alternate Current into Direct Current is called...?

(A) Anemometer
(B) Battery

(C) Galvanometer
(D) Rectifier

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When sound waves travel from air to water which of the following quantities remains unchanged...?

(A) Speed
(B) Frequency

(C) Intensity
(D) Wavelength

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The orbit of the Earth is an elongated circle is called...?

(A) Ellipse
(B) Parabola

(C) Hyperbola
(D) Oval

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The defect in which the image is formed beyond the retina is called...?

(A) Long-sightedness
(B) Blind spotting

(C) Short-sightedness
(D) Image defect

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The study of the structure of the body is called _______ ...?

(A) Anthropobiology
(B) Anatomy

(C) Aphnology
(D) Apiology

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MRI is stand for _____...?

(A) Magnetic Resonance Imaging
(B) Magnetic Related Imaging

(C) Both
(D) None

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If you travel to the Moon your mass will remain same because...?

(A) You are in a different gravitational field
(B) You are in a different atmosphere

(C) You are made up of the same amount of matter
(D) You are in a different time zone

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