Sample Model Questions: PHYSICS

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Tuesday, December 4, 2012

Sample Physics Question -9 for SSC

Cadet College

2^nd Term-End Examination 2008

Class- IX

Subject- Physics ( Subjective)

Time: 2 hrs. Total Marks: 50

Answer any five from group A and Group B.

Group -A

1. Define velocity and speed. 1+1= 2

2. What do you mean by incrtia ? 2

3. What is momentum? 2

4. Define force and unit of force. 1+1=2

5. How sound is produced? 2

6. Define audibility range and infrasonic wave. 1+1=2

7. What do you mean 20 J of work? 2

Group -B

8. a) Write down the difference between scalar quantity and vector quantity. 4

b) Deduce first law from the second law of Newton's law of motion. 4

9. a) Prove F = ma 5

b) A froce of 100 N acts on a stationary body of mass 50 Kg for 2 seconds. What will be

the velocity of the body at the end of this time? 3

10. a) Deduce the law of conservation of momentum. 6

b) What are the advantages of friction? 2

11. a) Derive, S = ut +

a t². 6

b) A bullet of mass 10 g leaves the barrel of a gun of mass 6 Kg at the velocity of 300 ms^-1.

Determine the backward velocity of the gun. 2

12. a) What is sound pollution? 2

b) Find the least distance between the source of sound and the reflector to hear an echo. 6

13. a) Mention some uses of ultrasonic waves. 2

b) Describe the process of determining the depth of a well by means of echo. 6

. .

14. a) Show that W = F. S 4

b) Explain work done by a force and against the force. 4

Monday, November 12, 2012

Sample Physics Question -8 for SSC

Class-X

Subject- Physics (Objective)

Time: 35 Minutes Full Marks: 35

1. Who discovered x‑ray?

(a) H. Bacquerel (b) Roentgen

2. Which one is a derived unit?

(a) Mole (b) Candela (c) Watt (d) Kelvin

3. When the velocity of a body is double what would be its kinetic energy?

(a) 3 times (b) 4 times (c) 5 times (d) 8 times

4. If 90 N force is applied on a body of mass 30kg what would be the acceleration?

(a)

ms^-2 (b) 24 kgms^-2

5. For small angular displacement, what is the relation between the time period T and the effective length L of a simple pendulum?

(a) T α L (b) T α

(d) T α L²

6. Gravitation force depends on which one?

(a) Mass of the two particles

(b) Shape of the two particles

(d) Nature of the medium.

7. Which one is the value of g at the topical region?

(a) 9.87ms^-2 (b) 9.78ms^-2

8. What is called the maximum displacement of a bob on either side of its position of equilibrium?

(a) Amplitude (b) Oscillation

9. Kinetic energy is proportional to which one of the following?

(a) Velocity (b) Weight

10. Which is the correct formula for pressure?

(a) p= FA (b) (c)

(d)

11.What does it mean by the quantity of matter contained in unit volume of a body ?

(a) volume (b) intensity (c)Density (d) pressure

12. If a body is immerged in a gas or liquid what seems to be with the weight?

(a) increases (b) decreases

13. When water is converted into ice, what happens to its volume?

(a) expands (b) decreases

14. What is the orientation of wave to the direction of vibration of particles in transverse wave?

(a) In parallel (b) At an angle of 30⁰

15. The distance that a wave travels per unit time in definite direction is called -

(a) Wave length (b) Wave velocity

16.What is called if a transmitting particle starts its journey from a certain point and comes back to the same point?

(a) Time period (b) Frequency

17.Which one of the following is mechanical wave?

(a) Light (b) Heat (c) sound (d) Radio

18.Intermolecular force is least in which one ?

(a) Carbon (b) liquid (c) solid (d) gaseous

19.What is called the temperature at which water can co-exist as ice, water and water vapor ?

(a) Curie point (b) Triple point

20.What happens to the kinetic energy of atoms with increase of heat ?

(a) Decreases (b) remains same

21.In which of the following liquid do we find anomalous expansion?

(a) Milk (b) water (c) petrol (d) Mercury

22.Which one of the following liquid is volatile?

(a) Water (b) milk (c) Benzene (d) mercury

23. Which ray is used to examine Crystal structure?

a) a ‑ray (b) b ‑ray (c) X‑ray (d) g ‑ray

24. Which one is the correct equation for amount of heat gained or lost?

(a) Q=msDθ (b) Q=mDQ

25. How heat is transmitted by the process of radiation?

(a) By the movement of the molecules of the medium.

(b) In the form of mechanical wave.

(d) By the vibrations of the molecules of the medium.

26. Conduction of heat is maximum in which medium?

(a) Solid (b) Liquid

27. The rate of evaporation depends on which factor?

(a) Temperature of the liquid

(b) Density of the liquid

(d) Mass of the liquid

28. In which process heat is transferred by the actual movement of the molecules?

(a) Conduction (b) Convection

29. In which year Dr. Otto first designed petrol engine?

(a) 1885 (b) 1888 (c) 1886 (d) 1880

30. Interference, diffraction and polarization display which nature of light?

(a) Wave nature (b) particle nature

31. What is called the amount of light emitted per second from a luminous source?

(a) Luminous (b) luminous flux

32. When light passes from one medium to another medium how many kinds of incidence can happen?

(a) two (b) three (c) four (d) five

33. Velocity of light in optically denser medium is-

(a) more (b) less (c) Equal (d) both (a)and(b)

34. How many conditions are there for total internal reflection?

(a) two (b) three (c) four (d) five

35. Rod nerve response to intense which light?

(a) Bright light (b) Dream light

Monday, October 15, 2012

Sample Physics Question -7 for SSC

Horizontal	Cadet College Pre-test Examination-10 Subject-Physics (Theoretical)	Subject Code:136 Set-Ka
Full Marks-40	Class-X	Time- 2 hours

[N.B-Figure in the right side indicate full marks of the questions. Answer any five questions from each group A and nay five from group B]

Group-A

1. What is vernier constant? How does it determine? 1+1=2

2. What is force? Determine the dimension of force. 1+1=2

3. Show the validity of equation v = u + at with the help of dimensional equation. 2

4. Prove that the force acting on any charge placed at any point in the electric field is

equal to the product of the intensity and the charge at that point. 2

5. What is Hydroelectricity? What is meant by efficiency? 1+1=2

6. What do you mean by echo? What is sound pollution? 1+1=2

7. State the inverse square law of illumination. What is Solid angle? 1+1=2

8. How electricity is produced by friction? 2

9. What is solenoid and electromagnet? 2

10. What i9s diamagnetic and paramagnetic substance? 2

Group-B

11. (a) What is momentum? State and prove the law of conservation of

momentum. 1+3 = 4

(b) A body of mass 4kg moving with 12ms^-1 meets another body of mass 6kg coming

from opposite direction with the velocity of 4ms ^-1 and becomes a single body. What will be the velocity of the combined body? 2

12. (a) State and explain the Ohm's law. Prove that I =

, where electromotive force of a cell is E, internal resistance of the cell is r and external resistance of the circuit is R.1+3 = 4 (b) The three resistances of value 5

, 10

and 20

are connected in parallel, determine the equivalent resistances 2

13. (a) How the equivalent resistance is determined in case of parallel connection of resistances and show that this is smaller than any of connected resistance? 4

(b) What will be the cost if a bulb of 60 W runs 5 hours a day for 30 days and the rate of electric energy Tk. 200 per unit? 2

14. (a) State and explain the Netware's law of Gravitation and define Gravitational constant G from it. 2+2 = 4

(b) Determine the value of G considering the mass of the Earth 5.975 x 10²⁴ kg and uniform sphere of radius 6.37 x 10⁶m and the acceleration due to gravity 9.8 ms^-2 of it surface. 2

15. (a) What do you mean by inertia? Derive the equation F=ma, where the symbols have their usual meaning 1+3 = 4

(b) A force of 100N acts on a stationary body of masses 50 kg for 2 seconds. What will be the velocity of the body at the end of this time? 2

16. (a) Discuss the mechanism for propagation of sound in air? What is sensation of sound? 3+1 = 4

(b) Derive the relation V=f

. 2

17. (a) What is anomalous expansion of water ? Establish the relation between real expansion and apparent expansion of liquid. 1+3 = 4

(b) What is freon? What is the function of the compressor of a refrigerator? 2

18.(a) Describe the construction and working principle of a ammter. 1+3 = 4

(b) The sound wave produced by a toning fork of frequency 250 HZ describes a distance of 1020 m during 35 in air. Find the wavelength of the wave in air. 2

19.(a) What is an Otto cycle? Describe with diagram the construction of petrol

engine. 1+3=4

(b)100g water at 70⁰c is well mixed with 20⁰g water at 100c what will be the final 2 temperature?

20. (a)What is luminous intensity? Explain mirage in desert. 1+3 = 4

(b) Prove that with clear figure, focal length of concave mirror is half of radius of

curvature. 2

Sylhet Cadet College

Cadet Name :

Cadet No :

Form :

Pre-test Examination 2010

Class- X

Subject: -Physics (Objective)

[NB. Put the tick () mark against the correct answer. Each question carries one mark.]

1. What is the orientation of a wave to the direction of vibration of particles in Longitudinal wave ?

(a) In parallel (b) At an angle of 45⁰

2. The wavelength of a sound wave produced by a body in air is 0.2 m. If the speed of sound is 340ms-1 in air, what is its frequency?

(a) 1600 Hz (b) 1700 Hz

3.Which one of the following does not represent the characteristic of simple harmonic motion?

(a) Periodic motion (b) Rotational motion

4. The speed of sound doesn't depend on ----

(a) Temperature (b) Medium

5.How many laws obey by the reflection of sound?

(a) 2 (b) 3 (c) 4 (d) 5

6.How long a sound persists in our brain after its hearing?

(a) 1 second (b) 0.1 second

7.What should be the minimum distance between reflector and listener in order to hear an echo of sound at 0⁰C temperature?

(a) 15.5 m (b) 16.6 m

8.What happens to the kinetic energy of atoms with increase of heat?

(a)Decreases (b)Increases

(c)Remains same (d)All

9.What is called the increase of volume?

(a)Linear expansion

(b)Cubic expansion

(d) Caterer expansion

10.Which scientist invented calorimeter?

(a)Joule (b)Regnault

(c)Royal (d)Charls

11.Which one is good conductor?

(a) Mercury (b) Wood

12.Value of thermal conductivity depends on

(a) Length of the conductor

(b) Area of cross section of the conductor

(d) Material of the conductor

13.Forth stroke is called

(a)Working stroke (b) Changing stroke

14.Heat engine converts which energy into mechanical energy?

(a)Sound energy (b) Electricity

(c)Mechanical energy (d) Magnetic energy

15. What will be the illumination on a page of a book placed at a distance 5m from a candle of luminous intensity 100cd ?

(a) 4 cdm^-2 (a) 4 cdm²

(a) 8 cdm^-2 (a) 6 cdm²

16. An object is placed on the principal axis between centre of curvature and principal focus of a concave mirror. Where would be the position of the image?

(a) Behind the mirror

(b) Between centre of curvature and infinity.

(d) Between the centre of curvature and principal focus.

17. On what factor the refractive index of a medium depends?

(a) Density of the medium

(b) Angle of incidence

(d) Angle of refraction.

18. Which one acts as a mirror?

(a) a plane paper (b)a wall

(c)surface of calm water (d)Ground glass

19. For small angular displacement, what is the relation between the time period T and effective length L of simple pendulum at any place?

(a) Ta

(b) Ta L

(c)

(d) Ta L²

20. Which quantities have same unit dimension?

(a) Mass and Weight

(b) Velocity and Displacement

(d) Heat and Temperature

21. What is the derivation of 1N?

(a)

(b)

(c)

(d)

22. The velocity of a car becomes 10ms^-1after travelling 9m by pressing the acceleration, which can produce acceleration of 2ms^-2. What was the velocity of the car at that moment of pressing the acceleration?

(a) 7ms⁻² (b) 8ms⁻²

23. Which is the equation for the volume of a cylinder?

(a)

(b)

(c)

(d)

24. What is the are pressure at 0⁰C temperature in the surface of the earth?

(a) 1.01´10⁵Pa (b) 1.01´10⁴Pa

25. During floatation how many parts of ice block remains submerged?

(a)

(b)

(c)

(d)

26. Who gave the prediction regarding solar ellipse?

(a) Bacquerel

(b) Democritus

(d) Thales

27. Who told that "the sun is at the centre of the solar system and the earth and the other planets are revolving around the sun"?

(a) Aristotle

(b) Newton

(d) Aristarchus

28. Which one is the value of "g" in the poles?

(a) 9.823ms⁻² (b) 9.382ms⁻²

29. What is called the point at which weight always acts?

(a) Centre of gravity

(b) Centre of gravitational

(d) Central point

30. What is the value of permeability of vacuum?

(a) 8.854´10^--12 C² N⁻¹m^-2

(b) 8.854´10^--12 C² N⁻²m^-2

(d) 8.854´10^--10 C² N⁻¹m^-2

31. At constant temperature, if the potential difference is V, and the current I flow through a resistance R, thus what will be the relation among them?

(a)

(b) V=RI

(d) VR=I

32. What will happen, if the potential difference between two bodies maintained-

(a) Electron flow will end

(b) Electron flow will finished

(d) Electron flow will continue for a certain time

33 In Alinco-alloy which one will not found?

(a) Nickel

(b) Cobalt

(d) Barium

34. The equivalent resistance will be increased in which type of connection?

(a) Series connection

(b) Parallel connection

(d) Both series and parallel connection

35. Which one is the unit of specific resistance?

(a) Ohm-m²

(b) Ohm-m

(d) Ohm⁻²-m

Sample Model Questions