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PGT Physics Mock Test By DVS. Learn To Converge Your Dreams with Durgam Vigyan Sansthana Institute. Subscribe me on Youtube

1. A body is thrown vertically upwards with initial velocity 9.8 m/s. If the value of acceleration due to gravity is 9.8 m/s^2 then:

1. its velocity is reduced to 49 m per second after 5 seconds
2. it attains the maximum height of 980 m after 10 seconds
3. it attains a maximum height of 490 m in 5 seconds
4. it reaches ground after 10 seconds

2. A projectile covers the same horizontal distance when the initial angles of projection are:

1. 30 degree and 40 degree
2. 30 degree and 45 degree
3. 30 degree and 60 degree
4. 30 degree and 50 degree

3. A car covers the first half of the distance between two placed at 40 km/hr and other half at 60 km/hr:

1. 78 km/hr
2. 48 km/hr
3. 50 km/hr
4. 68 km/hr

4. A cylinder with a movable piston contains 3 moles of hydrogen at standard temperature and pressure. The walls of the cylinder are made of a heat insulator, and the piston is insulated by having a pile of sand on it. By what factor does the pressure of the gas increase if the gas is compressed to half its original volume

1. 2.64 atm
2. 3 atm
3. 1.6 atm
4. 3.5 atm

5. During an experiment, a signal from a spaceship reached the ground station in five minutes. What was the distance of the spaceship from the ground station? The signal travels at the speed of light, i.e. 3 X 10^8 m/s

1. 9 X 10^10 m
2. 9 X 10^12 m
3. 1 X 10^10 m
4. 9 X 10^9 m

6. When a small solid sphere is dropped in a viscous liquid, it finally acquires a uniform velocity which is called

1. Escape velocity
2. Critical velocity
3. Terminal velocity
4. Reynold velocity

7. A capacitor with air between its plates has a capacitance of 8 micro-F. Its capacitance on introducing a dielectric with dielectricconstant 6 between its plates (in uF), is:

1. 32
2. 40
3. 48
4. 16

8. The instrument used to measure optical rotation is known as:

1. Polarimeter
2. Spectrometer
3. Microscope
4. Interferometer

9. At the peak of nuclear binding energy curve:

1. Z is even but n is odd
2. Z isd odd but N is even
3. Both Z and N are even
4. Both Z and N are even

10. A tuning fork of frequency 260 Hz is vibrated with a sonometer wire and 5 beats are heard. If the tension in the wire is slightly increased, the beat frequency also increases. The original frequency of the sonometeris:

1. 260 Hz
2. 255 Hz
3. 265 Hz
4. 250 Hz

11. An adiabatic process is also known as:

1. isoentropic
2. isobaric
3. isochoric
4. isothermal

12. Which one of the following is used as coolant or moderator in a nuclear reactor:

1. distilled water
2. freshwater
3. heavy water
4. ice

13. A water drop of radius and to the power 10^(-2) m is broken into 1000 equal droplets if the surface tension of water is 0.075 N/m the gain in surface energy will be:

1. 8.5 x 10^(-4)
2. 8.5 x 10^(-6)
3. 1.5 x 10^(-4)
4. 8.5 x 10^(-2)

14. Threshold wavelength for a metal is 3000 angstrom what is the kinetic energy of an electron is ejected from it by radiation of wavelength 1200 angstrom:

1. 6.2 eV
2. 3.1 eV
3. 1.65 eV
4. 1.03 eV

15. If 1.20 V potential difference must be applied to stop the fastest photoelectrons emitted by a Nickel surface under the action of ultraviolet light of wavelength 2000 angstrom calculate the work function of Nickel:

1. 6.21 eV
2. 5.01 eV
3. 1.03 eV
4. 3.1 eV

16. Planck's Radiation Law reduces to wien's law for

1. higher wavelength
2. lower wavelengths
3. lower temperature
4. higher temperature

17. A rectangular glass plate of refractive index 1.5 is used the corresponding polarising angle will be:

1. 56.3 degree
2. 33.7 degree
3. 23.4 degree
4. 43.7 degree

18. the displacement current arises due to:

1. Positive charges only
2 Negative charges only
3. Both positive and negative charges
4. Time varying electric field

19. The radius of the orbit of a satellite is 16 times the radius of the orbit of a geostationary satellite, the period of the satellite is:

1. 16 days
2. 4 days
3. 64 days
4. 96 days

20. The streamline flow of an incompressible and non-viscous liquid is described by:

1. Bernoulli equation
2. Poiseulle's law
3. Boyle's law
4. Archimedes principle