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Model Questions for MBBS
Part 1 – Physics
1. The constant µ0e0 has the same dimension as
a) reciprocal of velocity b) square of velocity c) velocity d) reciprocal of square of velocity
2. If mass of electron is9.11×10-31 kg, the number of electrons in 10g will be
a) 6×1028 b) 4.5×1024 c) 1.1×1028 d) 1.09×1027
3. The number of significant figures in 0.00450 are
a) 5 b) 4 c) 3 d) 7
4. A particle is moving with a velocity v = K(yi+xj), where K is a constant. The general equation for the path described by the particle is
a)y=x2+constant b) y2=x+constant c)x y=constant d) y2=x2+constant
5. A Wheel has moment of inertia 1 kg m2 about its vertical axis .It rotates at a rate of 60 rpm about this axis. The torque which can stop the wheel’s rotation in a minute is
a) p/12 b) p/15 c) p/18 d) p/30
6. A particle has an initial velocity of 3i+4j and an acceleration of 0.4i+0.3j.Its speed after 10s is
a) 7 units b) 8.5 units c) 10 units d) 7v2 units
7. Motion of planets in the solar system is an example of the conservation of
a)mass b) linear momentum c) angular momentum d) energy
8. The velocity with which a projectile must be launched so that it escapes earth’s gravitational field, does not depend on
a) mass of the earth b) mass of the projectile c) radius of the projectile’s orbit d) gravitational constant
9. An object is immersed in a fluid. For the object to become invisible it should
a) behave as a perfect reflector b) absorb all light falling on it c) have refractive index d) have refractive index exactly matching with the surrounding fluid
10. A particle is vibrating in simple harmonic motion with an amplitude 0.04 m. At what displacement from the equilibrium position is its energy half potential and half kinetic?
a) 1 cm b) 2 cm c) 2 2 cm d) 2 cm.
11. A lady wearing high heel shoes balances on a single heel. The heel is circular with a diameter 0.8 cm. The pressure exerted by the heel on the horizontal floor is 7.8 × 106 N/m2. The mass of the lady is
a) 40kg b) 50kg c) 60kg d) 10kg
12. Dettol can reach fine cavities formed in wounds to clean because
a) Surface tension of Dettol is greater than that of water
b) Surface tension of Dettol is equal to that of water
c) Dettol is highly viscous
d) Dettol is less viscous
13. Temperature of human body is 98.4° F. The corresponding temperatures on the celsius scale and kelvin scale are
a) 0°C and 273K b) 273 K and 17°C
c) 36.9°C and 309.9 K d) 17.2°C and 120.2 K.
14. If the sun becomes twice as hot,
a) the output radiant energy will be sixteen times larger
b) it will radiate predominantly ultraviolet
c) it will radiate monochromatic radiation
d) it becomes dark.
15. When water is heated convection currents occur because
a) warm water is heavier than coldwater
b) heat pushes the water up
c) warm water is less dense than coldwater
d) cold water is less dense than warm water
16. Velocity of light in a transparent medium is2 /3 of that in air. The refractive index of the medium is
a) 0.67 b) 1.1 c) 1.5 d) 0.12.
17. The source of energy for the sun to radiate is
a) fission b) thermo-electric power c) fusion d) photoelectric effect.
18. At a distance 4 metre from a lamp the intensity of illumination is 6 lux. The illuminating power of lamp is
a) 22 candela b) 9 candela c) 28 candela d) 96 candela.
19. If a star moves away from the earth, the spectral line of the star
a) shifts toward the red end of the spectrum
b) shifts toward the violet end of the Spectrum
c) does not shift
d) disappears
20. In the case of a parallel plate capacitor,when the distance between the two plates is reduced to one third and the area of the plate doubled, the capacitance
a) remains the same b) is doubled c) increases to five times d) increases to six times
21. If two identical point charges separated by 3 m experience a force of 10 newton, then the individual charge is
a) 100µ C b) 10µC c) 1µC d) 0.1µ C
22. A magnetic material has a magnetization of 3200 A/m and flux density of 14p × 10–4 weber/m2. The magnetizing force is
a) 10 A/m b) 200 A/m c) 3000 A/m d) 300 A/m.
23. The vertical component of earth’s magnetic field is zero at
a) magnetic equator b) magnetic poles c) geographic poles d) at 90° latitude.
24. Photon is a
a) quantum of matter b) positively charged particle c) negatively charged particle d) quantum of light.
25. The elementary particles having rest mass equal or greater than that of nucleons are
a) mesons b) leptons c) photons d) baryons.
26. The ratio of specific charge of proton and a-particle is
a) 2 : 4 b) 2 : 1 c) 1 : 4 d) 4 : 1.
27. Positive rays
a) cannot ionise gases
b) have no effect on photographic plate
c) cannot penetrate even through substances of small thickness
d) can disintegrate metals or cause Sputtering
28. When X-rays pass through air, they
a) produce light track in the air b) ionise the gas
c) produce fumes in air d) accelerate gas atoms.
29. Which of the following has largest deBroglie wavelength ?, provided all have equal velocity?
a) CO2 molecule b) NH3 molecule c) proton d) O2 molecule.
30. The conversion of one element into another by bombarding the nucleus is called
a) natural radioactive b) chain reaction c) cosmic radiation d) artificial transmutation
31. The most important advantage of nuclear energy is
a) less time is required to generate the energy
b) a small nuclear fuel is sufficient to produce huge amount of energy
c) less safety measures are sufficient
d) many operational difficulties are not there
32. An increase of temperature of a semiconductor decreases
a) the resistivity b) the band gap c) the conductivity d) size of the semiconductor.
33. In an n-type semiconductor, the position of the Fermi level
a) is lower than the centre of the energy gap
b) is at the centre of the energy gap
c) is higher than that of the energy gap
d) can be anywhere depending on the doping concentrates.
34. At 0 K, germanium is a
a) conductor b) insulator c) superconductor d) semiconductor.
35. A p-type silicon crystal is electrically
a) positive b) negative c) neutral d) either positive or negative.
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