Refraction is a measure of the as a wave passes from medium to another
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The image of an object is found to be upright and reduced in size. What type of mirror is used to produce such an image?
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Convex mirrors are mostly used as
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Which of the following is NOT true of experiments involving curved mirrors?
A. image distance is negative for for real image
B. object distance is positive
C. image distance is negative for virtual image
D. focal length is negative for convex mirrors
Answer: A
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Which of the following is NOT applicable when plotting the graph of experimental data?
A. Lines of best fit should always be used
B. circled dots or crosses may be used to show plotted points
C. thin, sharp and continuous lines are acceptable
D. the scale must be chosen to make the graph occupy as small as possible of the graph page
Answer: D
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The potential meter wire plays equivalent role of which of these devices in a circuit?
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The reason we can read print from any direction is that
A. the white part of a page reflects light in all directions
B. letters emit black light in all directions.
C. letters absorb black light from all directions.
D. all of the above
Answer: A
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In an experiment, potential difference is plotted on the vertical axis and current on the horizontal axis. The slope of the graph represents
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For a metallic conductor, Ohm's law holds provided
A. potential difference varies
B. current remains constant
C. temperature remains constant
D. potential difference remains constant
Answer: C
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Calculate the distance and magnification of an object placed 20cm from a converging lens
A. 60cm and 0.3 times the size of object
B. 20cm and 0.3 times the size of object
C. 60cm and 3 times the size of object
D. 80cm and 3 times the size of object
Answer: D
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