NEET 1999 Physics Paper: AIPMT

Inductors & DC Transients (Mixed)

• (a)zero in both $A_1$ and $A_2$
• (b)maximum in both $A_1$ and $A_2$
• (c)zero in $A_1$ and maximum in $A_2$
• (d)maximum in $A_1$ and zero in $A_2$

Combination of Capacitors

• (a)$6\ \mu\text{F}$
• (b)$12\ \mu\text{F}$
• (c)$18\ \mu\text{F}$
• (d)$24\ \mu\text{F}$

Dielectrics

• (a)$\sqrt{2}\,C$
• (b)$2C$
• (c)$\frac{C}{\sqrt{2}}$
• (d)$\frac{C}{2}$

Centre of Mass of Discrete Particles

• (a)horizontal surface
• (b)centre of one of the balls
• (c)line joining the centres of any two balls
• (d)point of intersection of the medians

Cells: EMF, Internal Resistance & Combinations

• (a)$0.5\text{ V}$
• (b)$1.9\text{ V}$
• (c)$1.95\text{ V}$
• (d)$2\text{ V}$

Kirchhoff's Laws & Measuring Instruments

• (a)$1.6\text{ A}$
• (b)$2\text{ A}$
• (c)$0.32\text{ A}$
• (d)$3.2\text{ A}$

Ohm's Law, Resistivity & Temperature

• (a)zero
• (b)ohmic
• (c)non-ohmic
• (d)infinity

Potentiometer

• (a)$0.5\text{ V/m}$
• (b)$2\text{ V/m}$
• (c)$5\text{ V/m}$
• (d)$10\text{ V/m}$

Wheatstone Bridge & Metre Bridge

• (a)$0.25\ \Omega$
• (b)$0.4\ \Omega$
• (c)$0.5\ \Omega$
• (d)$4\ \Omega$

Photoelectric Effect: Einstein's Equation

• (a)4125 Å
• (b)3000 Å
• (c)6000 Å
• (d)2062.5 Å

Photoelectric Experiment: Intensity, Stopping Potential & Graphs

• (a)photo-current increases
• (b)photo-current decreases
• (c)kinetic energy of emitted photoelectrons increases
• (d)kinetic energy of emitted photoelectrons decreases

Displacement Current, Maxwell's Equations & Production

• (a)a stationary charge
• (b)uniformly moving charges
• (c)accelerated charges
• (d)all of the above

Electromagnetic Spectrum & Atmosphere

• (a)less than $3 \times 10^{-7}\text{ m}$
• (b)equal to $3 \times 10^{-7}\text{ m}$
• (c)more than $3 \times 10^{-7}\text{ m}$
• (d)all of the above

Nature of EM Waves & Wave Equation

• (a)$2\times 10^{6}\text{ m}$
• (b)$3\times 10^{6}\text{ m}$
• (c)$4\times 10^{6}\text{ m}$
• (d)$5\times 10^{6}\text{ m}$

Electric Charge & Coulomb's Law

• (a)decreases $K$ times
• (b)increase $K$ times
• (c)remains unchanged
• (d)becomes $\frac{1}{K^2}$ times

Electrostatic Potential Energy

• (a)decreases
• (b)increases
• (c)remains same
• (d)becomes zero

Electrostatic Potential Energy

• (a)$1540\text{ eV}$
• (b)$13.6\text{ eV}$
• (c)$1\text{ eV}$
• (d)zero

Escape Velocity

• (a)$\sqrt{\frac{GM_e}{R_e}}$
• (b)$\sqrt{\frac{2GM_e}{R_e}}$
• (c)$\sqrt{\frac{2Gm}{R_e}}$
• (d)$\frac{GM_e}{R_e^2}$

Circular Motion (Related PYQs)

• (a)$250\text{ N}$
• (b)$750\text{ N}$
• (c)$1000\text{ N}$
• (d)$1200\text{ N}$

Impulse & Momentum Conservation

• (a)$0.7\text{ kg/s}$
• (b)$1.4\text{ kg/s}$
• (c)$0.07\text{ kg/s}$
• (d)$10.7\text{ kg/s}$

Field of a Magnet & Magnet in a Uniform Field

• (a)$\vec{M} \cdot \vec{B}$
• (b)$-\vec{M} \cdot \vec{B}$
• (c)$\vec{M} \times \vec{B}$
• (d)$-\vec{M} \times \vec{B}$

Magnetic Materials & Curie Law

• (a)attracted by a magnet
• (b)repelled by a magnet
• (c)repelled by north pole and attracted by south pole
• (d)attracted by north pole and repelled by south pole

Ampere's Law, Cylinders, Solenoid & Toroid

• (a)inside the pipe only
• (b)outside the pipe only
• (c)both inside and outside the pipe
• (d)no where

Biot-Savart Law & Circular Coils

• (a)$0.2\text{ T}$
• (b)$2 \times 10^{-4}\text{ T}$
• (c)$6.28 \times 10^{-4}\text{ T}$
• (d)$9.8 \times 10^{-4}\text{ T}$

Magnetic Field of Straight Wires

• (a)twice the earlier value
• (b)one-half of the earlier value
• (c)one quarter of the earlier value
• (d)same as earlier value

Radioactive Decays: Alpha, Beta, Gamma

• (a)2 free protons
• (b)helium atoms
• (c)singly ionised helium atoms
• (d)doubly ionised helium atoms

Radioactive Decays: Alpha, Beta, Gamma

• (a)mass number reduces by 2
• (b)mass number reduces by 6
• (c)atomic number reduces by 2
• (d)atomic number remains unchanged

Simple Pendulum

• (a)$16\text{ s}$
• (b)$12\text{ s}$
• (c)$8\text{ s}$
• (d)$4\text{ s}$

Relative Velocity in Two Dimensions

• (a)$1.0\text{ m/s}$
• (b)$0.5\text{ m/s}$
• (c)$0.25\text{ m/s}$
• (d)$0.43\text{ m/s}$

Prism, Dispersion & Scattering

• (a)$30^\circ$
• (b)$45^\circ$
• (c)$60^\circ$
• (d)$75^\circ$

Spherical Surfaces & Thin Lenses

• (a)$50\text{ cm}$
• (b)$100\text{ cm}$
• (c)$200\text{ cm}$
• (d)$400\text{ cm}$

Moment of Inertia & Radius of Gyration

• (a)$\frac{2}{3}MR^2$
• (b)$\frac{3}{2}MR^2$
• (c)$\frac{4}{5}MR^2$
• (d)$\frac{5}{4}MR^2$

Intrinsic & Extrinsic Semiconductors

• (a)P
• (b)Al
• (c)B
• (d)Mg

Intrinsic & Extrinsic Semiconductors

• (a)protons
• (b)extra electrons
• (c)neutrons
• (d)missing electrons

Intrinsic & Extrinsic Semiconductors

• (a)holes
• (b)electrons
• (c)protons
• (d)neutrons

Logic Gates

• (a)OR gate
• (b)XOR gate
• (c)AND gate
• (d)NAND gate

Other / Mixed

• (a)3.3 Å
• (b)3.9 Å
• (c)4.3 Å
• (d)4.8 Å

P-N Junction Diode

• (a)electrons
• (b)protons
• (c)mobile charge carriers
• (d)immobile ions

P-N Junction Diode

• (a)increases
• (b)decreases
• (c)remains constant
• (d)first increases then decreases

Degrees of Freedom & Internal Energy

• (a)2
• (b)4
• (c)6
• (d)8

Thermodynamic Processes

• (a)$475^\circ\text{C}$
• (b)$402^\circ\text{C}$
• (c)$275^\circ\text{C}$
• (d)$375^\circ\text{C}$

Calorimetry, Latent Heat & Mechanical Equivalent of Heat

• (a)$270^{\circ}\text{C}$
• (b)$230^{\circ}\text{C}$
• (c)$100^{\circ}\text{C}$
• (d)$50^{\circ}\text{C}$

Thermometry & Thermal Expansion

• (a)$\alpha_1 l_1 = \alpha_2 l_2$
• (b)$\alpha_1 l_2 = \alpha_2 l_1$
• (c)$\alpha_1^2 l_2 = \alpha_2^2 l_1$
• (d)$\alpha_1 l_2^2 = \alpha_2 l_1^2$

Units & Dimensions

• (a)$[\mathrm{ML^{2}T^{-2}A^{-1}}]$
• (b)$[\mathrm{ML^{3}T^{-2}A^{-2}}]$
• (c)$[\mathrm{M^{0}L^{-2}T^{2}A^{-2}}]$
• (d)$[\mathrm{ML^{2}T^{-1}A^{2}}]$

Vector Basics, Unit Vectors & Components

• (a)$1$
• (b)$\sqrt{0.11}$
• (c)$\sqrt{0.01}$
• (d)$0.39$

Vector (Cross) Product

• (a)$6\hat{i} + 2\hat{j} - 3\hat{k}$
• (b)$-18\hat{i} - 13\hat{j} + 2\hat{k}$
• (c)$18\hat{i} + 13\hat{j} - 2\hat{k}$
• (d)$6\hat{i} - 2\hat{j} + 8\hat{k}$

Beats

• (a)$306\text{ m/s}$
• (b)$331\text{ m/s}$
• (c)$340\text{ m/s}$
• (d)$360\text{ m/s}$

Biprism, Thin Films & Other Devices

• (a)refraction
• (b)dispersion
• (c)interference
• (d)diffraction

Kinetic Energy & Momentum

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