Oscillations & Waves Mock Tests

A source of sound moves toward a stationary observer with speed vs = v/3 (v is speed of sound). The apparent frequency is f₁. When the source moves away, the apparent frequency is f₂. The ratio f₁/f₂ is:

A simple pendulum of length l is suspended from the ceiling of an elevator. When the elevator is at rest, the period of oscillation is T₀ = 2π√(l/g). If the elevator accelerates upward with acceleration a, the new period of oscillation is:

A sound source of frequency 450 Hz moves towards a stationary observer with speed 33 m/s. If the speed of sound is 330 m/s, the apparent frequency heard by the observer is:

A sound source of frequency 500 Hz moves toward a stationary observer with speed 30 m/s. The apparent frequency is: (speed of sound = 340 m/s)

A particle executes simple harmonic motion with amplitude A and time period T. The time taken by the particle to move from the mean position to a displacement of A/2 is:

A block of mass m is suspended from a spring of spring constant k. The block is pulled down by a distance x and released. The maximum speed attained by the block is:

A block of mass m is attached to two springs of spring constants k₁ and k₂ connected in parallel. The period of oscillation is:

A string of length 1 m is fixed at both ends and vibrates in its third harmonic. What is the wavelength of the standing-wave?