• If we, round off 64.34546 up to three significant figures .the best answer is:

1. 64.3
2. 64.4
3. 64.5
4. 64.6

• The magnitude of vector product of two non-zero vectors A and B is:

1. ABcosθ
2. ABsinθ
3. ABsinθ
4. ABsinθcosθ

• When average velocity becomes equal to instantaneous then the body is called moving with:

1. Instantaneous acceleration
2. Constant acceleration
3. Constant velocity
4. Variable velocity

• For which pair the horizontal ranges of a projectile is same:

1. (30°, 45°)
2. (50° . 70°)
3. (20° , 40°)
4. (30° , 60°)

• Work done will be minimum when the angle between force and displacement is:

1. 0°
2. 90°
3. 120°
4. 180°

• In rotational motion, the torque is equal to rate of change of:

1. Angular velocity
2. Linear Momentum
3. Angular Momentum
4. Angular acceleration

• The rotational K.E of a Hoop of mass "m" moving down frictionless inclined plane with velocity "v" will be:

1. 1/4mv²
2. 1/2mv²
3. 1/4mv²
4.  mv²

• A communication satellite is used to reflect the signal of

1. Microwaves
2. Radiowaves
3. y-rays
4. x-rays

• Venturimeter is used to measure

1. Speed of fluid
2. Density of fluid
3. Pressure of fluid
4. Viscosity of Said

• A phenomenon by which energy is dissipated from die oscillating system is called:

1. Forced oscillations
2. Free oscillations
3. Simpleharmonic oscillations
4. Damping

• The pitch of sound depends upon

1. Intensity of sound
2. Wavelength of sound
3. Frequency of sound
4. Loudness of sound

• The number of node(s) between two consecutive antinodes is:

1. One
2. Two
3. Three
4. Four

• The velocity of sound in vacuum is

1. 280 mS^-1
2. 333 mS^-1
3. 380 mS^-1
4. Zero mS^-1

• Newton's sings are formed due to phenomenon of:

1. Diffraction of light
2. Interference of light
3. Polarization of light
4. Total internal reflection

• In Michelson's experiment, the relation used to find the speed of light is

1. C=16f/d
2. C=16fd
3. C=fd/16
4. C=16d/f

• Net change in entropy of a system after one complete Carrot cycle is:

1. Positive
2. Negative
3. Zero
4. Sometimes positive and sometimes negative

• The temperature scale which is independent of nature of substance is:

1. Thermodynamic scale
2. Centigrade scale
3. Fahrenheit scale
4. Renault scale

SUBJECTIVE PART
SECTION B

Q2. Write short answers to any EIGHT (8) questions.

1. Define meter and kelvin
2. What is difference between random error and systematic error?
3. What are the dimensions and units of  [Fxl/M]^1/2?
4. Define light year and what are the units and dimensions of light year
5. Name the different conditions that could make.A.B=
6. Two vectors of magnitude 10 each making angle 180° with each other. Find the magnitude of their resultant
7. What is the angle between two vectors of some magnitude? If they were to be combined to give a resultant equal to a vector of the same magnitude
8. Why is first law or motion also called law of inertia?
9. How acceleration and distance can be calculated from velocity-time graph?
10. What is the principle of rocket propulsion?
11. At what point or points in its path does a projectile have its minimum speed and maximum speed
12. Why fog droplets appear to be suspended in air'?

Q3: Write short answers to any EIGHT (8) questions.

1. Calculate the work done in Joule and in Kilo Joules in lifting a mass of 10 Kg at a steady velocity through a vertical height of 10 m
2. An object has I Joule of P.E. Explain what does it mean
3. How energy can be obtained from sea tides. Explain briefly
4. Define angular velocity, how its direction is determined?
5. Define centripetal force write its formula and unit
6. How many minimum number of geostationary satellites are required for global coverage of T.V transmission? Show with diagram
7. Define free Oscillations and forced Oscillations
8. The equation for SHM of an object is given by X = 0.25 Cos (θ/8)
9. What will be the displacement after 2 Sec
10. Does the frequency depend on amplitude for a harmonic Oscillator explain briefly
11. Is it possible for two identical waves traveling in the same direction along a string to give rise to a stationary wave? Explain briefly
12.  What does sound travel in solid than in gases?
13. Explain the terms redshift and blue Shift in Doppler's Effect

Q4: Write short answers to any SIX (6) questions.

1. Write the names of any four processes to obtain plane polarized beam of light from unpolarized light
2. How would you get more orders of spectra using a diffraction grating?
3. An oil film spreading over a wet foot path shows colours. Explain how does it happen?
4. What is spectrometer
5. Why would it be advantageous to use blue light with a compound microscope?
6. Why does the pressure of a gas in a car tyre increases when it is driven through some distance?
7. Specific heat of a gas at constant pressure is greater than specific heat at constant volume. Why?
8. What do you mean by triplet point of water?
9. Write the Kelvin statement of the second law of thermodynamics

SECTION-C

Note: Attempt any THREE questions.

Q5.

1. Define rectangular components of a vector and explain addition of vectors by rectangular components
2. A football is thrown upward with an angle of 30° with respect to the horizontal to throw a 40 m pass what must be the initial speed of the ball?

Q6:

1. What is meant by centripetal force? Show by mathematical proof that a_c=V²/y
2. Ten bricks. Each 6.0 cm thick and mass 1.5 kg lie flat on a table. How much work is required to stack them one on the top of another

Q7:

1. Derive Bernoulli’s equation
2. Calculate the entropy change when one kilogram ice at 0 °C melts into water at 0 °C. Latent heat of fusion of ice Lf= 3.36. 105 J kg^-1

Q8:

1. Define simple harmonic motion. Prove that projection of particle moving in a circle on vertical diameter is a SHM.
2. An organ pipe has a length of 50 cm. Find the frequency of its fundamental note and the next harmonic when pipe is open at both ends

Q9:

1. What is diffraction grating? Explain diffraction using diffracting grating
2. A glass light pipe in air will totally internally reflect a light ray if its angle of incidence is at least 39°. What is the minimum angle for total internal reflection if pipe is in water?

(Refractive index of water = 1.33)