Everyday Science MCQs

5120 MCQs (Page 207 of 512)

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Transistor is a device that convert weak signal into__________?

A. Small signal
B. Strong signal
C. Both
D. None

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Dioptre is a unit of measurement for __________ ?

A. Current
B. Lens
C. Force
D. Focal length

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Which of the following is a force?

A. Heat
B. Light
C. Magnetism
D. Kinetic

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Which among the following types of lenses are prescribed by doctors for a patient suffering from astigmatism?

A. Cylindrical lens
B. Concave lens
C. Spherical lens
D. Convex lens

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A convex mirror always ___________ ?

A. Forms a real image
B. Forms a virtual image
C. Forms an inverted image
D. Produces a larger image

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A doctor who specializes in diseases of the nose?

A. Rhinologist
B. Otologist
C. Pathologist
D. Podiatrist

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The distance between the optical centre of a convex lens and its principal focus is called its_______?

A. Focal length
B. Radius of curvature
C. Power
D. Magnification

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Why the colour of the Ocean appears blue?

A. Because the sunlight falling on it is scattered.
B. Because the sunlight falling on it is absorbed.
C. Because the sunlight falling on it is refracted.
D. Because the sunlight falling on it is reflected.

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What type of a mirror is used in anti-shop-lifting-devices?

A. Convex mirror
B. Concave mirror
C. Plane mirror
D. Both (b) and (c)

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Dental mirror is what type of a mirror?

A. Convex mirror
B. Concave mirror
C. Plane mirror
D. None of these

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