Physics: Section - A (Q. No. 1 to 35)
1. The moment of inertia of a thin rod about an axis passing through its midpoint and perpendicular to the rod is 2400 g c`m^2`. The length of the 400 g rod is nearly :
(1) 20.7 cm
(2) 72 cm
(3) 8.5 cm
(4) 17.5 cm
2. A bob is whirled in a horizontal plane by means of a string with an initial speed of `\omega` rpm. The tension in the string is T. If speed becomes 2 `\omega` while keeping the same radius, the tension in the string becomes :
(1) T/4
(2) `sqrt 2`T
(3) T
(4) 4T
3. A thermodynamic system is taken through the cycle abcda. The work done by the gas along the path bc is :
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| NEET UG EXAM 2024 |
(1) - 90 J
(2) - 60 J
(3) zero
(4) 30 J
4.
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| NEET UG EXAM 2024 |
5. An unpolarised light beam strikes a glass surface at Brewster's angle. Then
(1) both the reflected and refracted light will be completely polarised.
(2) the reflected light will be completely polarised but the refracted light will be partially polarised.
(3) the reflected light will be partially polarised.
(4) the refracted light will be completely polarised.
6. If c is the velocity of light in free space, the correct statement about photons among the following are :
(A) The energy of a photon is E = h `\nu`
(B) The velocity of a photon is c.
(C) The momentum of a photon, `p = \frac{h \nu}{c}`
(D) In a photon-electron collision, both total energy and total momentum are conserved.
(E) Photon possesses a positive charge.
Choose the correct answer from the options given below :
(1) A, C and D only
(2) A, B, D, and E only
(3) A and B only
(4) A, B, C and D only
7. Two bodies A and B of the same mass undergo completely inelastic one-dimensional collision. The body A moves with velocity `v_1` while body B is at rest before the collision. The velocity of the system after collision is `v_2`. The ratio `v_1 : v_2` is :
(1) 4:1
(2) 1:4
(3) 1:2
(4) 2:1
8. A light ray enters through a right-angled prism at point P with the angle of incidence `30^\circ` as shown in the figure. It travels through the prism parallel to its base BC and emerges along the face AC. The refractive index of the prism is:
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| NEET UG EXAM 2024 |
(1) `\frac{\sqrt 3}{4}`
(2) `\frac{\sqrt 3}{2}`
(3) `\frac{\sqrt 5}{4}`
(4) `\frac{\sqrt 5}{2}`
9. If `x = 5 sin (\pi t + \frac {\pi}{3})` m represents the motion of a particle executing simple harmonic motion, the amplitude and time period of motion, respectively.
(1) 5 cm, 1 s
(2) 5 m 1 s
(3) 5 cm 2 s
(4) 5 m 2 s
10. At any instant of time t, the displacement of any particle is given by 2t - 1 (SI unit) under the influence of the force of 5 N. The value of instantaneous power is (in SI units) :
(1) 7
(2) 6
(3) 10
(4) 5
11. A tightly wound 100 turns coil of radius 10 cm carries a current of 7 A. The magnitude of the magnetic field at the centre of the coil is (Take permeability of free space as `4\pi \times 10^{- 7}` SI units):
(1) 4.4 mT
(2) 44 T
(3) 44 mT
(4) 4.4 T
12. A particle moving with uniform speed in a circular path maintains :
(1) Constant velocity but varying acceleration.
(2) varying velocity and varying acceleration.
(3) constant velocity.
(4) constant acceleraton.
15. In an ideal transformer, the turns ratio is `\frac{N_P}{N_S} = \frac{1}{2}` The ratio `V_s : V_p` is equal to (the symbols carry their usual meaning):
(1) 1:1
(2) 1:4
(3) 1:2
(4) 2:1
17. If the monochromatic source in Young's double slit experiment is replaced by white light, then
(1) There will be a central bright white fringe surrounded by a few colored fringes.
(2) All bright fringes will be of equal width
(3) The interference pattern will disappear.
(4) There will be a central dark fringe surrounded by a few colored fringes.
34. The quantities which have the same dimensions as those of solid angle are :
(1) Strain and arc
(2) Angular speed and stress
(3) Strain and angle
(4) Stress and angle
35. A thin spherical shell is charged by some source. The potential difference between the two points C and P (in V) shown in the figure is:
(Take `\frac{1}{4 \pi \epsilon_0} = 9 \times 10^9 ` SI units )
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| NEET UG EXAM 2024 (Question Paper - Physics) |
(1) `0.5 \times 10^5`
(2) Zero
(3) `3 \times 10^5`
(4) `1 \times 10^5`
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