NCERT/Class 11/Physics/Waves

Waves

Class 11 · Physics

36 questions13 easy13 medium10 hard

Sample Questions

Q1.Two sound waves of frequencies 256 Hz and 260 Hz are sounded simultaneously. The beat frequency is:

  • A256 Hz
  • B258 Hz
  • C4 Hz
  • D516 Hz

Q2.Standing waves are formed by superposition of:

  • ATwo waves of same frequency moving in the same direction
  • BTwo waves of same frequency moving in opposite directions
  • CWaves of different frequencies
  • DA wave with its own diffracted part

Q3.The intensity of a wave is proportional to:

  • AAmplitude
  • BSquare of amplitude
  • CCube of amplitude
  • DSquare root of amplitude

Q4.A standing wave on a string is given by y = 2 sin(πx/L) cos(ωt). The speed of the two interfering waves is (L = 1 m, ω = 10π rad/s):

  • A5 m/s
  • B10 m/s
  • C20 m/s
  • Dπ m/s

Q5.Newton's formula for the speed of sound assumed the propagation is isothermal. Laplace corrected this by assuming it is adiabatic. The corrected formula is:

  • Av = √(P/ρ)
  • Bv = √(γP/ρ)
  • Cv = √(ρ/P)
  • Dv = √(P/ργ)

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
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Concepts Covered

BeatsHarmonics and OvertonesInterference of WavesLaplace CorrectionNormal ModesPeriod and FrequencyProgressive Wave EquationReflection of WavesSpeed of SoundSpeed of Transverse WaveStanding WavesSuperposition PrincipleTypes of WavesWave SpeedWavelength and Wave Number

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