NEET 1993 Physics Paper: AIPMT

Which source is associated with a line emission spectrum?

Hydrogen atoms are excited from ground state of the principle quantum number 4. Then the number of spectral lines observed will be

Three resistances each of $4\ \Omega$ are connected to form a triangle. The resistance between any two terminals is

Current through $3\ \Omega$ resistor is $0.8$ ampere, then potential drop through $4\ \Omega$ resistor is

When light of wavelength 300 nm (nanometer) falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, however, light of 600 nm wavelength is sufficient for creating photoemission. What is the ratio of the work functions of the two emitters?

Number of ejected photoelectrons increases with increase

Momentum of photon wavelength $\lambda$ is

What is the self-inductance of a coil which produces 5 V when the current changes from 3 ampere to 2 ampere in one millisecond?

If $N$ is the number of turns in a coil, the value of self inductance varies as

A signal emitted by an antenna from a certain point can be received at another point of the surface in the form of

The escape velocity from earth is $11.2\text{ km/s}$. If a body is to be projected in a direction making an angle $45^\circ$ to the vertical, then the escape velocity is

A satellite $A$ of mass $m$ is at a distance of $r$ from the surface of the earth. Another satellite $B$ of mass $2m$ is at a distance of $2r$ from the earth's centre. Their time periods are in the ratio of

If the temperature of the sun is doubled, the rate of energy received on earth will be increased by a factor of

A monkey is decending from the branch of a tree with constant acceleration. If the breaking strength is 75% of the weight of the monkey, the minimum acceleration with which monkey can slide down without branch is

A block has been placed on a inclined plane with the slope angle $\theta$, block slides down the plane at constant speed. The coefficient of kinetic friction is equal to

A body starts from rest, what is the ratio of the distance travelled by the body during the 4th and 3rd second?

A coil carrying electric current is placed in uniform magnetic field

A charge moving with velocity $v$ in $X$-direction is subjected to a field of magnetic induction in negative $X$-direction. As a result, the charge will

The binding energy per nucleon is maximum in case of

Energy released in the fission of a single ${}^{235}_{92}\text{U}$ nucleus is 200 MeV. The fission rate of ${}^{235}_{92}\text{U}$ filled reactor operating at a power level of 5 W is

In the nuclear decay given below

${}^{A}_{Z}X \rightarrow {}^{A}_{Z+1}Y \rightarrow {}^{A-4}_{Z-1}B^{*} \rightarrow {}^{A-4}_{Z-1}B,$

the particles emitted in the sequence are

A body executes simple harmonic motion with an amplitude $A$. At what displacement from the mean position is the potential energy of the body is one fourth of its total energy?

A boat is sent across a river with a velocity of $8\text{ km h}^{-1}$. If the resultant velocity of boat is $10\text{ km h}^{-1}$, then velocity of river is

Time taken by sunlight to pass through a window of thickness 4 mm whose refractive index is $\frac{3}{2}$ is

In a rectangle $ABCD$ ($BC = 2AB$). The moment of inertia is minimum along axis through

A solid sphere, disc and solid cylinder all of the same mass and made of the same material are allowed to roll down (from rest) on the inclined plane, then

The part of the transistor which is heavily doped to produce large number of majority carriers is

Diamond is very hard because

The number of translational degrees of freedom for a diatomic gas is

Which of the following is not thermodynamical function?

110 joule of heat is added to a gaseous system whose internal energy is 40 J, then the amount of external work done is

An ideal gas $A$ and a real gas $B$ have their volumes increased from $V$ to $2V$ under isothermal conditions. The increase in internal energy

The time dependence of a physical quantity $p$ is given by $p = p_0 \exp(-at^2)$, where $a$ is a constant and $t$ is the time. The constant $a$

Turpentine oil is flowing through a tube of length $l$ and radius $r$. The pressure difference between the two ends of the tube is $P$. The viscosity of oil is given by $\eta = \frac{P(r^2 - x^2)}{4vl}$ where $v$ is the velocity of oil at a distance $x$ from the axis of the tube. The dimensions of $\eta$ are

Wave has simple harmonic motion whose period is 4 seconds while another wave which also possesses simple harmonic motion has its period 3 second. If both are combined, then the resultant wave will have the period equal to

The temperature at which the speed of sound becomes double as was at $27^\circ\text{C}$ is

A stretched string resonates with tuning fork frequency $512\text{ Hz}$ when length of the string is $0.5\text{ m}$. The length of the string required to vibrate resonantly with a tuning fork of frequency $256\text{ Hz}$ would be

A parallel beam of monochromatic light of wavelength 5000 Å is incident normally on a single narrow slit of width 0.001 mm. The light is focussed by a convex lens on a screen placed in focal plane. The first minimum will be formed for the angle of diffraction equal to

Interference was observed in interference chamber where air was present, now the chamber is evacuated, and if the same light is used, a careful observer will see

Two masses of $1\text{ g}$ and $9\text{ g}$ are moving with equal kinetic energies. The ratio of the magnitudes of their respective linear momenta is