CTET PAPER II 2019 · PYQ · Motion / Types of Motion · easy
Identify the incorrect statement from among the following:
Answer
The correct answer is D: All periodic motions are circular motions.. Not all periodic motions are circular. For example, the oscillation of a pendulum or a vibrating string is periodic but not circular.
A.The motion of earth around its axis is periodic motion.
B.The motion of light is rectilinear motion.
C.The motion of plucked string of a sitar is oscillatory motion.
D.All periodic motions are circular motions.✓ Correct
Explanation
Not all periodic motions are circular. For example, the oscillation of a pendulum or a vibrating string is periodic but not circular. Periodic motion is any motion that repeats at regular intervals; circular motion is just one type. The other three statements are correct.
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