NEET TEST SERIES 110 PHYSICS

1. Choose the correct option from the following options given below:

(a) In the ground state of Rutherford’s model electrons are in stable equilibrium. While in Thomson’s model electrons always experience a net-force.
(b) An atom has a nearly continuous mass distribution in a Rutherford’s model but has a highly non-uniform mass distribution in Thomson’s model
(c) A classical atom based on Rutherford’s model is doomed to collapse.
(d) The positively charged part of the atom possesses most of the mass in Rutherford’s model but not in Thomson’s model.

2. In Young’s double slit experiment, the fringe width is 12 mm. If the entire arrangement is placed in water of refractive index , then the fringe with becomes (in mm):

(a) 16
(b) 9
(c) 48
(d) 12

3. Match List I with List II

Choose the correct answer from the options given below:

(a) A-Ill, B-ll, C-l, D-l V
(b) A-lll, B-IV,C-II, 1X1
(c) A-IV,B-l,C-lll,D-ll
(d) A-ll, B-lll, C-l, D-IV

4. The mass of proton, neutron and helium nucleus are respectively 1.0073 u, 1.0087 u and 4.0015 u. The binding energy of helium nucleus is:

(a) 14.2MeV
(b) 56.8MeV
(c) 28.4MeV
(d) 7.1 MeV

5. The magnitude of torque on a particle of mass 1 kg is 2.5 Nm about the origin. If the force acting on it is 1 N, and the distance of the particle from the origin is 5m, the angle between the force and the position vector is (in radians):

a) π/6

b) π/3

c) π/8

d) π/4

6. In the given circuit, rms value of current (I_rms) through the resistor R is:

(a) 2A
(b) 1/2 A
(c) 20A
(d) 2√2 A

7. A cell of internal resistance r drives current through an external resistance R. The power delivered by the cell to the external resistance will be maximum when:

(a) R=0.001r
(b) R= 1000r
(c) R = 2r
(d) R = r 

8. Two satellites of masses m and 3m revolve around the earth in circular orbits of radii r & 3r respectively. The ratio of orbital speeds of the satellites respectively is:

(a) 1:1
(b) 3:1
(c) √3:1      
(d) 9:1

9. In an adiabatic process, the density of a diatomic gas becomes 32 limes its initial value. The final pressure of the gas is found to be n times the initial pressure. The value of n is:

(a) 32
(b) 326
(c) 128
(d) 1/32

10. A mass of 10 kg is suspended by a rope of length 4 m, from the ceiling. A force F is applied horizontally at the mid-point of the rope such that the top half of the rope makes an angle of 45° with the vertical. Then Fequals: (Take g = 10 ms^-2 and the rope to be massless)

(a) 100 N
(b) 90 N
(c) 70 N
(d) 75 N

11. The change in the value of ‘g’ at a height ‘h’ above the surface of the earth is the same as at a depth ‘d’ below the surface of the earth. When both ‘d* and ‘h’ are much smaller than the radius of earth, then which one of the following relations is correct?

(a) d=3h/2                   
(b) d= h/2
(c) d=h   
(d) d=2h

12. A particle of mass of 4 kg suspended from a spring of force constant 800 N m^-1 executes simple harmonic oscillations. If the total energy of the oscillator is 4 J, the maximum acceleration (in ms^-2) of the particle is

(a) 5
(b) 15
(c) 45
(d) 20

13. The motion of particle is described by the equation x = a + bt², where a = 15 cm and b=3 cm/s^-2. Its instant velocity at time 3 sec will be

(a) 36cm/sec
(b) 9cm/sec
(c) 4.5cm/sec
(d) 18cm/sec π

14. A coil of insulated wire is connected to a battery. If it is taken to galvanometer, its pointer is deflected, because

(a) induced current is produced
(b) the coil acts like a magnet
(c) the number of turns in the coil of the galvanometer are changed
(d) None of these

15. A mass of m kg moving with a speed of 1.5 m/s on a horizontal smooth surface, collides with a nearly weightless spring of force constant k = 50 N/m. If the maximum compression of the spring is 0.15 m, the value of mass m is

(a) 0.5kg
(b) 0.15kg
(c) 0.12kg
(d) 1.5kg

16. The perfect gas equation for 4 gram of hydrogen gas is

(a) PV= RT
(b) PV=2RT
(c) PV = 1/2RT               
(d) PV = 4RT

17. According to Einstein’s photoelectric equation, the plot of the kinetic energy of the emitted photoelectrons from a metal vs the frequency of the incident radiation gives a straight line whose slope

(a) depends on the intensity of the radiation
(b) depends on the nature of the metal used
(c) depends both on the intensity of the radiation and the metal used
(d) is the same for all metals and independent of the intensity of the radiation

18. If a body of mass 3 kg is dropped from the top of a lower of height 45 m. Then its kinetic energy after 3 sec is [take g= 10m/s²]

(a) 557J
(b) 1350J
(c) 1050J
(d) 1296J

19. In a nuclear fission, 0.1% mass is converted into energy. The energy released by the fission of 1 kg mass will be

(a) 9×10¹⁹J
(b) 9×10¹⁷J
(c) 9×10¹⁶J
(d) 9×10¹³J

20. If the coefficient of cubical expansion is x times of the coefficient of superficial expansion (area), then value of x is

(a) 3
(b) 25
(c) 1.5
(d) 2