Wave Phenomena — Flashcards
NIOS · Class 12 · Physics
40 flashcards for Wave Phenomena (NIOS Class 12 Physics) to test yourself on key terms and facts. Sample: "State the relation v = νλ and explain each"
Interactive on Super Tutor
Studying Wave Phenomena? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for flashcards and more.
Free trial, no card needed.
State the relation v = νλ and explain each term with its SI unit.
Answer
Formula: v = νλ Where: • v = velocity (speed) of the wave in m/s • ν = frequency of the wave in Hz (s⁻¹) • λ = wavelength in metres (m) Physical meaning: The wave travels a distance of one wavelengt…
A progressive harmonic wave is given by y = 10⁻⁴ sin(100πt − 0.1πx). Find its (i) frequency, (ii) wavelength, and (iii) wave velocity. (y and x in metres)
Answer
Step 1 — Compare with standard equation y = A sin(2πt/T − 2πx/λ): Given: y = 10⁻⁴ sin(100πt − 0.1πx) (i) Finding frequency: 2πν = 100π → ν = 50 Hz ✓ (ii) Finding wavelength: 2π/λ = 0.1π → λ = 2/0.1…
What is the propagation constant k? Write its formula, unit, and physical meaning.
Answer
Propagation Constant (k): Formula: k = 2π/λ Unit: rad/m (radians per metre) Physical meaning: k represents the phase change per unit distance (per metre) as the wave travels through the medium. Re…
Write the general equation of a simple harmonic wave travelling along the positive x-axis and explain each term.
Answer
General Equation: y(x, t) = a sin(ωt − kx) Where: • y = displacement of particle at position x at time t (in m) • a = amplitude (maximum displacement) in m • ω = 2πν = angular frequency in rad/s • k …
Differentiate between transverse and longitudinal waves. Give one example of each.
Answer
Transverse Waves: • Particle displacement is PERPENDICULAR to direction of propagation • Appear as crests and troughs • Travel only in SOLIDS or on surface of liquids • Example: Light waves, waves on …
Write Newton's formula for the velocity of sound in a gas. Calculate the speed of sound in air at STP using Newton's formula. (P = 1.01 × 10⁵ N/m², ρ = 1.29 kg/m³)
Answer
Newton's Formula: v = √(P/ρ) Assumption: Compression and rarefaction during sound propagation are ISOTHERMAL (constant temperature). Calculation at STP: Given: P = 1.01 × 10⁵ N/m², ρ = 1.29 kg/m³ v…
What is Laplace's correction? Write the corrected formula and verify it for air at STP.
Answer
Laplace's Correction: Laplace argued that sound propagation in air is ADIABATIC (not isothermal) because: 1. Air is a poor conductor of heat 2. Compressions/rarefactions happen too rapidly for heat ex…
At what temperature is the speed of sound in air DOUBLE its value at STP (273 K)?
Answer
Key Formula: v ∝ √T (from v = √(γRT/m)) Given: v' = 2v₀, T₀ = 273 K, find T Step 1 — Using the proportionality: v'/v₀ = √(T/T₀) Step 2 — Substitute: 2 = √(T/273) Step 3 — Square both sides: 4 = T/…
+32 more flashcards
Practise AllFrequently Asked Questions
What are the important topics in Wave Phenomena for NIOS Class 12 Physics?
How many flashcards are available for Wave Phenomena?
How should I revise Wave Phenomena for the NIOS Class 12 board exam?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Wave Phenomena
Practice Quiz
Test yourself with a quick quiz
Important Questions
Exam-style questions with answers
Revision Notes
Key points for last-minute revision
Formula Sheet
The chapter's formulas in one place
Chapter Summary
Understand the chapter at a glance
Concept Maps
See how topics connect
Study Plan
Step-by-step plan for this chapter
Syllabus
What topics to cover
For serious students
Get the full Wave Phenomena chapter — start free.
Quizzes, flashcards, an AI doubt solver and a study plan for NIOS Class 12 Physics. Free to start, no card needed.