Science Practice Quiz 78

Q1.What is the main function of large concave mirrors in solar furnaces?

A. To disperse sunlight evenly across a wide area B. To reflect heat away from the furnace to prevent overheating C. To concentrate sunlight to produce heat D. To generate electricity directly from solar radiation

Q2.Concave mirrors are used in vehicle headlights and search-lights primarily to achieve which effect?

A. To produce a diffused beam of light for wider illumination B. To get powerful parallel beams of light C. To reduce the intensity of light to avoid blinding other drivers D. To change the color of light for better visibility in fog

Q3.For studying the image formed by a convex mirror, what are the two primary positions of the object considered?

A. At infinity and at the center of curvature B. At infinity and at a finite distance from the mirror C. At the focus and at the pole D. Between the pole and the focus, and beyond the center of curvature

Q4.According to Table 9.2, when an object is placed at infinity from a convex mirror, what is the nature of the image formed?

A. Real and inverted B. Real and erect C. Virtual and inverted D. Virtual and erect

Q5.What is the relative size of the image formed by a convex mirror when the object is placed at infinity, according to Table 9.2?

A. Enlarged B. Same size C. Highly diminished, point-sized D. Diminished but not point-sized

Q6.As per Table 9.2, when an object is placed between infinity and the pole P of a convex mirror, what is the nature of the image formed?

A. Real and inverted B. Virtual and erect C. Real and erect D. Virtual and inverted

Q7.For an object placed between infinity and the pole P of a convex mirror, where is the image formed according to Table 9.2?

A. At the focus F B. At the center of curvature C C. Between P and F, behind the mirror D. Beyond the center of curvature C

Q8.What is the relative size of the image formed by a convex mirror when the object is placed between infinity and the pole P, as per Table 9.2?

A. Enlarged B. Same size C. Highly diminished D. Diminished

Q9.Which type of mirror is commonly used as a rear-view (wing) mirror in vehicles?

A. Plane mirror B. Concave mirror C. Convex mirror D. Cylindrical mirror

Q10.What kind of image is always formed by a convex mirror, making it preferred as a rear-view mirror?

A. Inverted and enlarged B. Erect and enlarged C. Inverted and diminished D. Erect and diminished

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Science Practice Quiz 78