Dentists use Concave mirror to view enlarged images of teeth. These mirrors curve inwards and have the ability to create magnified, upright virtual images when an object is placed within a certain distance (focal point).
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100 Questions
100 Marks
90 Mins English English100 Questions100 Marks90 Mins English English100 Questions100 Marks90 Mins EnglishWhich of the following statements about average velocity is NOT correct?
A ball is dropped from rest. What will be the velocity of the ball after falling 20 m? (Take g = 10 m/s²)
A convex lens forms an image of an object placed 30 cm away. The image is formed at 60 cm on the other side. The magnification is:
If the acceleration of a body is halved and mass remains constant, the force will
Which of the following statements is/are NOT true regarding the work done by a constant force acting on a body?
(i) The work done by the force can never be negative.
(ii) If the direction of the force and displacement of the body is same, the work done will be positive.
(iii) The S.l. unit of work done is Pascal.
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