# Waves and Oscillation Past Papers

[OBJECTIVE]

Subject: Physics-II (Waves and Oscillation)

Time Allowed: 15 Minutes

Max Marks: 10

NOTE: Attempt this Paper on this Question Sheet only. Please encircle the correct option. Division of marks is given in front of each question. This Paper will be collected back after expiry of time limit mentioned above.

Part-I  Answer the following Questions, cutting and overwriting are not allowed. (10)

A body with frequency f, would complete one vibration in:

(a) f.sec                                                (b) (1/f) sec

(c) I sec                                                                 (d) f2

The vibratory or oscillatory motion of a body is:

(a) Translatory Motion                   (b) Back and forth motion about mean position

(c) Free fall Motion                         (d) Circulatory Motion

The distance between two consecutive anti nodes is

(a) 2λ                                                     (b) λ

(c) λ/2                                                   (d) λ/4

Conversion of water in to ice in refrigerator is an example of:

(a) Adiabatic Process                      (b) Isothermal Process

(c) Isochoric Process                       (d) None of these

The steam engine is:

(a) An Optical System                     (b) A Thermal System

(c) Thermodynamic System         (d) None of these

The equation PV =nRT is called:

(a) Boyles law                                    (b) Charles law

(c) Ideal gas law                                (d) None of these

When two objects come to common temperature, the objects are said to be in:

(a) Static Equilibrium                       (b) Dynamic Equilibrium

(c) Thermal                                         (d) None of these Equilibrium

In all irreversible processes the entropy:

(a) Remains Constant                     (b) Increases

(c) Decreases                                     (d) None of these

The wave motion setup in any medium depends upon:

(a) Elasticity                                        (b) Inertia

(c) Density                                          (d) All of these

Wavelength (λ), ) frequency(f) and velocity of wave (v) are related as:

(a) V = fλ                                              (b) λ = Vf

(c) f =Vλ                                               (d) None of these

[SUBJECTIVE]

Subject: Physics-II (Waves and Oscillation)

Time Allowed: 2 Hours 45 Minutes

Max Marks: 50

NOTE: ATTEMPT THIS (SUBJECTIVE) ON SEPARATE ANSWER SHEET PROVIDED

Part-II  Give Short Answers, Each question carries equal marks. (20)

Q#1: What is time period of second’s pendulum.

Q#2: Define Wave length A and write its unit.

Q#3: Define Kinetic Energy write its formula.

Q#4: State Vander Waals equation briefly.

Q#5: Define pressure of gas and write its formula.

Q#6: What is reversible process, give its example.

Q#7: What is Brownian Motion.

Q#8: What are travelling waves.

Q#9: Define simple Harmonic Motion (SHM).

Q#10: Why sound of woman is more shrill as compared to man?

Part-III  Give Long Answers, Each question carries equal marks. (30)

Q#3: (a) State and explain Doppler effect. Write its at least four cases.

(b) A train sounds its horn before it sets off from the station and observer waiting on the plate farm, its frequency at 1200 Hz. Then train moves steadily and after 50 seconds driver sounds horn again, the observer standing on the plate farm estimates the frequency 1140Hz calculate the speed of train after 50 seconds.(speed of sound = 340 ms.1).

Q#4: (a) Define and explain the 2nd law of the thermodynamics.

(b) Prove that PVλ = constant for an adiabatic process.

Q#5: (a) What is damped harmonic motion. Find its equation and drive its solution, also define damped Harmonic oscillator.

(b) Prove for simple Harmonic motion, the acceleration (a) depends upon the amplitude.