NEET 1989 Physics Paper: AIPMT

Bohr Model: Orbits, Speed & Angular Momentum

• (a)conservation of linear momentum
• (b)quantisation of angular momentum
• (c)conservation of quantum frequency
• (d)none of these

Quantum Numbers, X-rays & Other Questions

• (a)$1s^2\, 2s^2\, 2p^2\, 2s^4$
• (b)$1s^2\, 2s^2\, 2p^6\, 3s^1\, 3p^3$
• (c)$1s^2\, 2s^2\, 2p^8\, 3s^2$
• (d)$1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^2$

Combination of Resistors

• (a)$n$
• (b)$1/n^2$
• (c)$n^2$
• (d)$1/n$

Electrical Power & Heating Effect

• (a)0.5
• (b)2
• (c)4
• (d)20

Electrical Power & Heating Effect

• (a)more with 40 bulbs than with 39
• (b)more with 39 bulbs than with 40
• (c)equal in both the cases
• (d)in the ratio $40^2 : 39^2$

Matter Waves: de Broglie Wavelength

• (a)$\frac{h}{mv}$
• (b)$hmv$
• (c)$\frac{mh}{v}$
• (d)$\frac{m}{hv}$

Photoelectric Effect: Einstein's Equation

• (a)$3.2 \times 10^{-21}\text{ J}$
• (b)$3.2 \times 10^{-19}\text{ J}$
• (c)$7 \times 10^{-25}\text{ J}$
• (d)$9 \times 10^{-32}\text{ J}$

Self-Inductance & Energy

• (a)electric field only
• (b)magnetic field only
• (c)dielectric strength
• (d)both (a) and (b)

Electromagnetic Spectrum & Atmosphere

• (a)X-rays
• (b)$\gamma$-rays
• (c)Microwaves
• (d)Radiowaves

Escape Velocity

• (a)$11\text{ km/s}$
• (b)$11\sqrt{3}\text{ km/s}$
• (c)$\frac{11}{\sqrt{3}}\text{ km/s}$
• (d)$33\text{ km/s}$

Satellites - Orbital Velocity & Period

• (a)$R$
• (b)$R^0$ (independent of $R$)
• (c)$1/R^2$
• (d)$1/R$

Law of Equipartition of Energy

• (a)$\frac{nkT}{N}$
• (b)$\frac{nkT}{2N}$
• (c)$\frac{nkT}{2}$
• (d)$\frac{3kT}{2}$

Mean Free Path & Real Gases

• (a)collision on walls will be less
• (b)number of collisions per unit time will increase
• (c)collisions will be in straight lines
• (d)collisions will not change

Impulse & Momentum Conservation

• (a)$7\sqrt{2}$
• (b)$5\sqrt{2}$
• (c)$3\sqrt{2}$
• (d)$\sqrt{2}$

Motion Under Gravity

• (a)4: 5
• (b)7: 9
• (c)16: 25
• (d)1: 1

Law of Radioactive Decay

• (a)$1/2$
• (b)$1/16$
• (c)$1/8$
• (d)$1/256$

Law of Radioactive Decay

• (a)energy of gamma rays
• (b)half-life
• (c)radioactivity
• (d)intensity of gamma rays

Mass Defect & Binding Energy

• (a)8 MeV
• (b)8 eV
• (c)8 J
• (d)8 erg

Radioactive Decays: Alpha, Beta, Gamma

• (a)$A$ and $C$ are isotopes
• (b)$A$ and $C$ are isobars
• (c)$A$ and $B$ are isotopes
• (d)$A$ and $B$ are isobars

Damped, Forced Oscillations & Superposition

• (a)$\omega_1 \neq \omega_0$ and $\omega_2 = \omega_0$
• (b)$\omega_1 = \omega_0$ and $\omega_2 = \omega_0$
• (c)$\omega_1 = \omega_0$ and $\omega_2 \neq \omega_0$
• (d)$\omega_1 \neq \omega_0$ and $\omega_2 \neq \omega_0$

Motion in a Plane (2-D Kinematics)

• (a)70.7 km/hr along south-west direction
• (b)zero
• (c)50 km/hr along west
• (d)70.7 km/hr along north-west direction

Prism, Dispersion & Scattering

• (a)$\mu A$
• (b)$\frac{\mu A}{2}$
• (c)$\frac{A}{\mu}$
• (d)$\frac{A}{2\mu}$

Rolling Motion

• (a)$\sqrt{2gh}$
• (b)$\sqrt{\frac{3}{4}gh}$
• (c)$\sqrt{\frac{4}{3}gh}$
• (d)$\sqrt{4gh}$

Intrinsic & Extrinsic Semiconductors

• (a)number of electrons increases while that of holes decreases
• (b)number of holes increases while that of electrons decreases
• (c)number of electrons and holes remain same
• (d)number of electrons and holes increases equally

Junction Transistor

• (a)FET
• (b)filter
• (c)rectifier
• (d)oscillator

Units & Dimensions

• (a)$\text{km/s}$
• (b)$\text{km s}$
• (c)$\text{km/s}^2$
• (d)$\text{km s}^2$

Units & Dimensions

• (a)$[\mathrm{MLT^{-2}A^{-2}}]$
• (b)$[\mathrm{ML^{2}T^{-1}A^{-2}}]$
• (c)$[\mathrm{ML^{2}T^{-2}A^{-2}}]$
• (d)$[\mathrm{ML^{2}T^{-2}A^{-1}}]$

Units & Dimensions

• (a)$[\mathrm{ML^{2}T^{-2}}]$
• (b)$[\mathrm{MLT^{-2}}]$
• (c)$[\mathrm{ML^{-1}T^{-2}}]$
• (d)$[\mathrm{ML^{-2}T^{-2}}]$

Units & Dimensions

• (a)Energy per unit volume
• (b)Force per unit area
• (c)Product of voltage and charge per unit volume
• (d)Angular momentum

Speed of Waves

• (a)$110\text{ m s}^{-1}$
• (b)$165\text{ m s}^{-1}$
• (c)$77\text{ m s}^{-1}$
• (d)$102\text{ m s}^{-1}$

Wave Basics & Properties of Sound

• (a)increasing by a factor of 2
• (b)decreasing by a factor of 2
• (c)decreasing by a factor of 4
• (d)unchanged

Superposition, Coherence & Intensity

• (a)light waves only
• (b)sound waves only
• (c)both light and sound waves
• (d)neither light nor sound waves

Wave Theory, Wavefronts & Doppler Effect

• (a)much smaller than the wavelength of light
• (b)of the same order as the wavelength of light
• (c)of the order of one millimetre
• (d)much larger than the wavelength of light

Kinetic Energy & Momentum

• (a)$1 : 2$
• (b)$1 : 4$
• (c)$4 : 1$
• (d)$1 : 1$

Work-Energy Theorem

• (a)375
• (b)3750
• (c)5000
• (d)500