CET / SIET SCHOLARSHIP PRACTICE- TEST 2 (SUBJECT: PHYSICS)

JavaScript isn't enabled in your browser, so this file can't be opened. Enable and reload.

WE WISH YOU GOOD LUCK FOR THE TEST

Name: *

E mail ID:

Mobile Number : *

Gender: *

Male

Female

"Please Answer all the Questions to know the correct Answers in view score after submission" .

(Estimated Answering Time Duration: 60 Min to 75 Min)

1. Unit of impulse is

1 point

Newton

Kg-m

Kg-m/s

Joule

Clear selection

2. Which one of the following does not have the same dimensions?

1 point

Work and Energy

Angle and strain

Relative density and refractive index

Planck constant and energy

Clear selection

3. A 150 m long train is moving with a uniform velocity of 45km/h. The time taken by the train to cross a bridge of length 580 metre is

1 point

56s

68s

80s

92s

Clear selection

4. Water drops fall at regular intervals from tap which is 5m above the ground. The third drop is leaving the tap at the instant the first drop touches the ground. How far above the ground is the second drop at that instant?

1 point

2.50 m

3.75 m

4.00 m

1.25 m

Clear selection

5. A gun is aimed at a target in a line of its barrel. The target is released and allowed to fall under gravity, at the same instant the gun is fired. The bullet will

1 point

Pass above the target

Pass below the target

Hit the target

Certainly miss the target

Clear selection

6. A particle covers 50 m distance when projected with an initial speed. On the same surface it will cover a distance, when projected with double the initial speed is

1 point

100 m

150 m

200 m

250 m

Clear selection

7. New ton’s first law of motion describes the following

1 point

Energy

Work

Inertia

Moment of inertia

Clear selection

8. If a person with a spring balance and a body hanging from it goes up and up in an aeroplane, then the reading of the weight of the body as indicated by the spring balance will

1 point

Go on increasing

Go on decreasing

First increasing and Then decreasing

Remain the same

Clear selection

9. A girl presses her physics text book against a rough vertical wall with her hand. The direction of the frictional force on the book exerted by the wall is

1 point

downwards

upwards

Out from the wall

Into the wall

Clear selection

10. A 2 kg stone at end of a string 1 m long is whirled in a vertical circle at a constant speed. The speed of the stone is 4 m/s. The tension in the string will be 52 N, when the stone is

1 point

At the top of the circle

At the bottom of the circle

Halfway down

None of the above

Clear selection

11. The work done by a body against friction always results in

1 point

Loss of kinetic energy

Loss of potential energy

Gain of kinetic energy

Gain of potential energy

Clear selection

12. The slope of kinetic energy displacement curve of a particle in motion is

1 point

Equal to the acceleration of the particle

Inversely proportional to the acceleration

Directly proportional to the acceleration

None of above

Clear selection

13. When a mass is rotating in a plane about a fixed point its angular momentum is

1 point

The radius

The tangent the orbit

The line at angle of 450 to the plane of rotation

The axis of rotation

Clear selection

14. Moment of inertia of a uniform circular disc about a diameter is I. Its moment of inertia about an axis perpendicular to its plane and passing through a point on its rim will be

1 point

Clear selection

15. If the distance between two masses is doubled, the gravitational attraction between them

1 point

Is doubled

Becomes four times

Is reduced to half

Is reduced to a Quarter

Clear selection

16. If radius of the earth contracts by 2% and its mass remains the same, then weight of a body at the earth surface

1 point

Will decrease

Will increase

Will remain the same

None of these

Clear selection

17. A wire is loaded by 6 kg at its one end, the increase in length is 12 mm. If the radius of the wire is doubled and all other magnitudes are unchanged, then increase in length will be

1 point

6 mm

3mm

24mm

48mm

Clear selection

18. If the potential energy of a spring is V on stretching it by 2cm, then its potential energy When it is stretched by 10 cm will be

1 point

V/25

V/5

25V

Clear selection

19. A beaker containing a liquid is kept inside a big closed jar. If the air inside the jar continuously pumped out. The pressure in the liquid near the bottom of the liquid will

1 point

Increase

Decrease

Remain constant

First decrease and then Increase

Clear selection

20. A hollow sphere of volume V is floating on water surface with half immersed in it. What should be the minimum volume of water poured inside the sphere so that the sphere now sinks into the water

1 point

V/2

V/3

V/4

Clear selection

21. Two metal strips that constitute a thermostat must necessarily differ in their

1 point

mass

length

Resistivity

Coefficient of linear expansion

Clear selection

22. If mass energy equivalence is taken into account, when water is cooled to form ice, the mass of water should

1 point

Increase

Remain unchanged

decrease

First increase then decrease

Clear selection

23. At what temperature is the rms velocity of hydrogen molecule equal to that of an oxygen molecule at 47℃?

1 point

10K

20k

30k

40k

Clear selection

24. The molar specific heat at constant pressure of an ideal gas is (7/2) R. The ratio of specific heat at constant pressure to that at constant volume is

1 point

7/5

8/7

5/7

9/7

Clear selection

25. A perfect gas contained in a cylinder is kept in vacuum. If the cylinder suddenly bursts, then the temperature of the gas

1 point

Remains constant

Becomes zero

Increase

Decrease

Clear selection

26. When heat is given to a gas in an isothermal change the result will be

1 point

External work done

Rise in temperature

Increase in internal energy

External work done and also rise in temperature.

Clear selection

27. A pendulum suspended from the ceiling of a train has a period T. When The train is at rest. When the train is accelerating with a uniform acceleration a, the period

1 point

Increase

Decrease

Remain unaffected

Become infinite

Clear selection

28. A body executes S.H.M. with amplitude A . The displacement of the body when the potential energy is one – third of its kinetic energy is

1 point

A/3

A/2

A/√2

A/√3

Clear selection

29. Velocity of sound waves in air is 330 m/s. For a particular sound in air , a path difference of 40 cm is equivalent to a phase difference of 1.6p. The frequency of this wave is

1 point

165Hz

150Hz

660Hz

330Hz

Clear selection

30. Two open organ pipes of length 25 cm and 25.5 cm produce 10 beat/s. The velocity of sound will be

1 point

255 m/s

250 m/s

350 m/s

None of these

Clear selection

31. There are two metallic spheres of same radii but one is solid and the other is hollow, then

1 point

Solid sphere can be given more charge

Hollow sphere can be more charge

They can be charged equally(maximum)

None of the above

Clear selection

32. A given charge is situated at a certain distance from an electric dipole in the end-on position experiences a force F, if the distance of the charge is doubled, the force acting on the charge will be

1 point

F/2

F/4

F/8

Clear selection

33. When a slab of a dielectric material is introduced between the parallel plates of a capacitor which remains connected to a battery, then charge on plates relative to earlier charge

1 point

is less

is same

Is more

May be less or more depending on the nature of the material introduced

Clear selection

34. Two condensers of capacities 1µF and 2µF are connected in series and the system is charged to 120V. Then the P. D. On 1µF capacitor(in volts) will be

1 point

120

Clear selection

35. The length of the resistance wire is increased by 10%. What is the corresponding change in the resistance of wire?

1 point

10%

25%

21%

Clear selection

36. A cell of constant e.m.f first connected to a resistance R1 and then connected to a resistance R2. If power delivered in both cases is same then the internal resistance of the cell is

1 point

√R1R2

√R1/R2

(R1-R2)/ 2

(R1+R2) / 2

Clear selection

37. A straight wire of a diameter 0.5mm carrying a current of 1 amps is replaced by another wire of 1mm diameter carrying the same current. The strength of magnetic field far away is

1 point

Twice the earlier value

Half of the earlier value

Quarter of the earlier value

Unchanged

Clear selection

38. A charged particle is projected in a plane perpendicular to a uniform magnetic field. The area bounded by the path described by the particle is proportional to

1 point

The velocity

The momentum

The kinetic energy

None of these

Clear selection

39. Two identical thin bar magnets each of length l and pole strength m are placed at right angle to each other with north pole of one touching south pole of the other. Magnetic moment of the system is

1 point

2ml

√2ml

½ ml

Clear selection

40. The period of oscillation of a magnet in vibration magnetometer is 2sec. The period of oscillation of a magnet whose magnetic moment is four times that of the first magnet is

1 point

1 sec

4 sec

8 sec

0.5 sec

Clear selection

41. In electromagnetic induction, the induced charge in a coil is independent of

1 point

Change in the flux

Time

Resistance in the circuit

None of the above

Clear selection

42. Two identical induction coils each of inductance L joined in series are placed very close to each other such that the winding direction of one is exactly opposite to that of the other, what is the net inductance?

1 point

L / 2

Zero

Clear selection

43. In an AC Circuit peak value of voltage is 423V. Its effective voltage is

1 point

400 V

323 V

300 V

340 V

Clear selection

44. A 10 ohm resistance, 5mH coil and 10µF capacitor is joined in series. When a suitable frequency alternating current source is joined to this combination, the circuit resonates. If the resistance is halved, the resonance frequency

1 point

Is halved

Is doubled

Remains unchanged

Is quadrupled

Clear selection

45. A thin convex lens of focal length 10cm is placed in contact with a concave lens of same material and of same focal length. The focal length of combination will be

1 point

Zero

Infinity

10 cm

20 cm

Clear selection

46. A Plano convex lens is made of glass of refractive index 1.5. The radius of curvature of its convex surface is R. Its focal length is

1 point

R / 2

1.5R

Clear selection

47. Angular width of central maxima in the Fraunhofer diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength 6000 Å. When the slit is illuminated by light of another wavelength, the angular width decreases by 30%. The wavelength of this light will be

1 point

6000Å

4200 Å

3000 Å

1800 Å

Clear selection

48. In case of linearly polarised light, the magnitude of the electric field vector:

1 point

Does not change with time

Varies periodically with time

Increases and decreases linearly with time

Is parallel to the direction of propagation

Clear selection

49. The ozone layer absorbs

1 point

Infrared radiations

Ultraviolet radiations

x-rays

γ- rays

Clear selection

50. Radio waves and visible lights in vacuum have

1 point

Same velocity but different wave length

Continuous emission spectrum

Band absorption spectrum

Line emission spectrum

Clear selection

51. The ratio of specific charge of an α particle to that of a proton is

1 point

2:1

1:1

1:2

1:3

Clear selection

52. The approximate wavelength of a photon of energy 2.48 eV is

1 point

500Å

5000Å

2000Å

1000Å

Clear selection

53. Radius of first Bohr orbit is r. what is the radius of 2nd Bohr orbit?

1 point

2√2r

Clear selection

54. The angular speed of the electron in the nth orbit of Bohr’s hydrogen atom is

1 point

Option 1

Option 2

Option 3

Option 4

Clear selection

55. The mass number of He is 4 and that for sulphur is 32. The radius of sulphur nucleus is larger than that of helium, by times

1 point

√8

Clear selection

56. After two hours, one – sixteenth of the starting amount of a certain radioactive isotopes remained undecade. The half – life of the isotopes is

1 point

15 minute

30 minute

45 minute

1 hour

Clear selection

57. The valence of the impurity atom that is to be added to germanium crystal so as to make it a N – type semiconductor, is

1 point

Clear selection

58. In a good conductor the energy gap between the conduction band and the valence band is

1 point

Infinite

Wide

Narrow

Zero

Clear selection

59. The characteristic. impedance of a coaxial cable is of the order of

1 point

50 Ω

200 Ω

270 Ω

None of these

Clear selection

60. The waves used in telecommunication are

1 point

Microwave

Cosmic rays

Clear selection

Submit

Clear form

Never submit passwords through Google Forms.

This form was created inside of Shridevi Institute of Engineering and Technology.

Does this form look suspicious? Report

Forms