NEET 1992 Physics Paper: AIPMT

In terms of Bohr radius $a_0$, the radius of the second Bohr orbit of a hydrogen atom is given by

Of the following pairs of species which one will have the same electronic configuration for both members?

The ionization energy of hydrogen atom is 13.6 eV. Following Bohr's theory, the energy corresponding to a transition between $3$rd and $4$th orbit is

The time constant of $C\text{-}R$ circuit is

A battery of e.m.f $10\text{ V}$ and internal resistance $0.5\ \Omega$ is connected across a variable resistance $R$. The value of $R$ for which the power delivered in it is maximum is given by

Kirchhoff's first law, i.e. $\Sigma i = 0$ at a junction, deals with the conservation of

The cathode of a photoelectric cell is changed such that the work function changes from $W_1$ to $W_2$ ($W_2 > W_1$ ). If the current before and after changes are $I_1$ and $I_2$, all other conditions remaining unchanged, then (assuming $h\nu > W_2$)

A rectangular coil of 20 turns and area of cross-section 25 sq. cm has a resistance of $100\ \Omega$. If a magnetic field which is perpendicular to the plane of coil changes at a rate of 1000 tesla per second, the current in the coil is

The total charge, induced in a conducting loop when it is moved in magnetic field depend on

The structure of solids is investigated by using

The mean radius of earth is $R$, its angular speed on its own axis is $\omega$ and the acceleration due to gravity at earth's surface is $g$. What will be the radius of the orbit of a geostationary satellite?

Consider a car moving along a straight horizontal road with a speed of $72\text{ km/h}$. If the coefficient of static friction between the tyres and the road is 0.5, the shortest distance in which the car can be stopped is (taking $g = 10\text{ m/s}^{2}$)

Which of the following curve does not represent motion in one dimension?

A body dropped from top of a tower fall through 40 m during the last two seconds of its fall. The height of tower is ($g = 10\text{ m/s}^2$)

A straight wire of length $0.5$ metre and carrying a current of $1.2$ ampere is placed in uniform magnetic field of induction $2$ tesla. The magnetic field is perpendicular to the length of the wire. The force on the wire is

The magnetic field at a distance $r$ from a long wire carrying current $i$ is $0.4$ tesla. The magnetic field at a distance $2r$ is

To convert a galvanometer into a ammeter, one needs to connect a

The energy equivalent of one atomic mass unit is

The mass of $\alpha$-particle is

Solar energy is due to

The mass density of a nucleus varies with mass number $A$ as

A simple harmonic oscillator has an amplitude $A$ and time period $T$. The time required by it to travel from $x = A$ to $x = A/2$ is

If a simple harmonic oscillator has got a displacement of $0.02\text{ m}$ and acceleration equal to $2.0\text{ m/s}^2$ at any time, the angular frequency of the oscillator is equal to

If a body $A$ of mass $M$ is thrown with velocity $v$ at an angle of $30^\circ$ to the horizontal and another body $B$ of the same mass is thrown with the same speed at an angle of $60^\circ$ to the horizontal, the ratio of horizontal range of $A$ to $B$ will be

There is a prism with refractive index equal to $\sqrt{2}$ and the refractive angle equal to $30^\circ$. One of the refractive surface of the prism is polished. A beam of monochromatic light will retrace its path if its angle of incidence over the refracting surface of the prism is

A beam of monochromatic light is refracted from vacuum into a medium of refractive index 1.5. The wavelength of refracted light will be

The speed of a homogenous solid sphere after rolling down an inclined plane of vertical height $h$ form rest without sliding is

A piece of copper and other of germanium are cooled from the room temperature to $80\text{ K}$, then

Which one of the following is the weakest kind of the bonding in solids?

For amplification by a triode, the signal to be amplified is given to

For an electronic valve, the plate current $I$ and plate voltage $V$ in the space charge limited region are related as

A thermodynamic system is taken from state $A$ to $B$ along $ACB$ and is brought back to $A$ along $BDA$ as shown in the $PV$ diagram. The net work done during the complete cycle is given by the area

If for a gas, $\frac{R}{C_V} = 0.67$, this gas is made up of molecules which are

Mercury thermometer can be used to measure temperature upto

The dimensions of universal gravitational constant are

$P$ represents radiation pressure, $c$ represents speed of light and $S$ represents radiation energy striking per unit area per sec. The non zero integers $x, y, z$ such that $P^{x}S^{y}c^{z}$ is dimensionless are

For production of beats the two sources must have

The frequency of sinusodial wave $y = 0.40\cos[2000t + 0.80]$ would be

With the propogation of a longitudinal wave through a material medium, the quantities transmitted in the propogation direction are

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by monochromatic blue light of the same intensity

In Young's double slit experiment carried out with light of wavelength $(\lambda) = 5000$ Å, the distance between the slits is 0.2 mm and the screen is at 200 cm from the slits. The central maximum is at $x = 0$. The third maximum (taking the central maximum as zeroth maximum) will be at $x$ equal to

A position dependent force, $F = (7 - 2x + 3x^2)\text{ N}$ acts on a small body of mass $2\text{ kg}$ and displaces it from $x = 0$ to $x = 5\text{ m}$. The work done in joule is