Oscillations and Waves
Oscillations and Waves is an important chapter in JEE Main Physics that explains periodic motion,
simple harmonic motion, wave motion, sound waves, resonance, and standing waves. This chapter builds strong
conceptual understanding and frequently appears in JEE Main examinations.
Topics Covered
- Periodic Motion
- Simple Harmonic Motion (SHM)
- Displacement, Velocity and Acceleration in SHM
- Energy in SHM
- Spring-Mass System
- Simple Pendulum
- Wave Motion
- Progressive Waves
- Superposition Principle
- Standing Waves
- Resonance
- Sound Waves in Air Columns and Strings
- Doppler Effect
Important Formulas
Displacement in SHM:
x = A sin(ωt + φ)
Angular Frequency:
ω = 2π/T
Time Period of Spring:
T = 2π√(m/k)
Time Period of Simple Pendulum:
T = 2π√(L/g)
Wave Speed:
v = νλ
Wave Equation:
y = A sin(kx − ωt)
JEE Main Preparation Tips
- Master SHM graphs of displacement, velocity, and acceleration.
- Practice spring and pendulum numerical problems.
- Understand standing wave formation and resonance.
- Memorize wave equations and Doppler effect concepts.
- Solve previous year JEE Main questions for speed and confidence.
