Simple harmonic motion is characterized by: MCQ with Answer and Explanation

Simple harmonic motion is characterized by:
A. Constant acceleration
B. Acceleration proportional to velocity
C. Constant velocity
D. Acceleration proportional to displacement and directed opposite
Answer: Option D
Solution (By JKExamLibrary)
SHM definition: acceleration a ∝ -x (displacement), i.e., a = -ω²x. This restoring acceleration causes oscillatory motion. Constant acceleration implies uniformly accelerated motion (not oscillatory). Constant velocity implies no acceleration. Memory tip: 'SHM: a = -ω²x; force F = -kx (Hooke's law)'. This conceptual question tests fundamental SHM characteristics, frequently examined in competitive exams. Always link to examples: mass-spring system, simple pendulum (small angles), LC circuits.

This question belongs to: Science Physics

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The heating element of an electric heater is made of nichrome because it has
A. Low resistivity and high melting point
B. High resistivity and high melting point
C. Low resistivity and low melting point
D. High resistivity and low melting point

Correct Answer: Option B


Explanation:
High resistivity for heat generation; high melting point to withstand high temperature without melting.

This question belongs to: Science Physics
Question #2 Report Error
The term 'latent heat' was introduced by
A. Joule
B. Calorie
C. Black
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Correct Answer: Option C


Explanation:
Joseph Black introduced concept of latent heat and specific heat.

This question belongs to: Science Physics
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The unit of latent heat is
A. J/°C
B. W
C. J/kg
D. J

Correct Answer: Option C


Explanation:
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This question belongs to: Science Physics