A gas expands in such a way that its pressure and volume satisfy the condition $\mathrm{PV}^2=$ constant. Then the tempe

A thin ring of radius ' $R$ ' carries a uniformly distributed charge. The ring rotates at constant speed ' $N$ ' r.p.s.

The r.m.s. velocity of gas molecules kept at temperature $27^{\circ} \mathrm{C}$ in a vessel is $61 \mathrm{~m} / \mathr

A regular hexagon of side 10 cm has a charge $1 \mu \mathrm{C}$ at each of its vertices. The potential at the centre of

A wheel of radius 1 m rolls through $180^{\circ}$ over a plane surface. The magnitude of the displacement of the point o

The end correction of resonance tube is 1 cm. If the shortest length resonating with a tuning fork is 15 cm , the next r

When 80 volt d.c. is applied across a solenoid, a current of 0.8 A flows in it. When 80 volt a.c. is applied across the

The earth is assumed to be a sphere of radius ' $R$ ' and mass ' $M$ ' having period of rotation ' $T$ '. The angular mo

When a galvanometer is shunted by a resistance ' $S$ ', its current capacity increases ' $n$ ' times. If the same galvan

In projectile motion two particles of masses $\mathrm{m}_1$ and $m_2$ have velocities $\vec{V}_1$, and $\vec{V}_2$ respe

The magnetic susceptibility of the material of a rod is 599. The absolute permeability of the material of the rod will b

If ' $l$ ' is the length of pipe, ' $r$ ' is the internal radius of the pipe and ' $v$ ' is the velocity of sound in air

A charged particle is moving along a magnetic field line. What is the magnetic force acting on the particle? $\left(\sin

A diatomic gas undergoes adiabatic change. Its pressure P and temperature T are related as $\mathrm{P} \propto \mathrm{T

The height at which the weight of the body becomes $\frac{1^{\text {th }}}{16}$ of its weight on the surface of the eart

A transformer is used to set up an alternating e.m.f. of 220 V to 4.4 kV to transmit 6.6 kW of power. The primary coil h

A monoatomic gas is heated at constant pressure. The percentage of total heat used for doing external work is

A parallel plate capacitor is charged and then isolated. If the separation between the plates is increased, which one of

The ratio of the radius of the first Bohr orbit to that of the second Bohr orbit of the orbital electron is

White light is incident on the interface of glass and air as shown in figure. If green light is just totally internally

Two loops ' $A$ ' and ' $B$ ' of radii ' $R_1$ ' and ' $R_2$ ' are made from uniform wire. If moment of inertia of ' A '

A series LCR circuit containing a resistance ' R ' has angular frequency ' $\omega$ '. At resonance the voltage across r

The period of a simple pendulum gets doubled when

The Boolean expression for ' $x-O R$ ' gate $C=(A \oplus B)$ is equal to

Two identical metal spheres are kept in contact with each other, each having radius ' $R$ ' cm and ' $\rho$ ' is the den

A violin emits sound waves of frequency ' $n_1$ ' under tension T. When tension is increased by $44 \%$, keeping the len

The graph of stopping potential ' $\mathrm{V}_{\mathrm{s}}$ ' against frequency ' $v$ ' of incident radiation is plotted

A steel ball of radius 6 mm has a terminal speed of $12 \mathrm{cms}^{-1}$ in a viscous liquid. What will be the termina

Two coils are kept near each other. When no current passess through first coil and current in the $2^{\text {nd }}$ coil

Two rods, one of copper ( Cu$)$ and the other of iron ( Fe ) having initial lengths $\mathrm{L}_1$ and $\mathrm{L}_2$ re

Frequency of a particle performing S.H.M. is 10 Hz . The particle is suspended from a vertical spring. At the highest po

Two charged particles each having charge ' $q$ ' and mass ' $m$ ' are held at rest while their separation is ' $r$ '. Th

The pressure inside a soap bubble $A$ is 1.01 atmosphere and that in a soap bubble B is 1.02 atmosphere. The ratio of vo

In Young's double slit experiment, in an interference pattern, second minimum is observed exactly in front of one slit.

An observer moves towards a stationary source of sound with a velocity of one-fifth of the velocity of sound. The percen

A diatomic molecule has moment of inertia ' I ', By applying Bohr's quantization condition, its rotational energy in the

The frequency of incident light falling on a photosensitive material is doubled, the K.E. of the emitted photoelectrons

A screen is placed at 50 cm from a single slit, which is illuminated with light of wavelength 600 nm . If separation bet

A rod of length ' $l$ ' is rotated with angular velocity ' $\omega$ ' about its one end, perpendicular to a magnetic fie

A convex lens of focal length ' $f$ ' produces a real image whose size is ' $n$ ' times the size of an object. The dista

A liquid drop of density ' $\rho$ ' is floating half immersed in a liquid of density ' $d$ '. If ' $T$ ' is the surface

When the electron orbiting in hydrogen atom in its ground state moves to the third excited state, the de-Broglie wavelen

When a particle in linear S.H.M. completes two oscillations, its phase increases by

Resistances in the left gap and right gap of a meter bridge are $10 \Omega$ and $30 \Omega$ respectively. If the resista

A charge $+Q$ is placed at each of the diagonally opposite corners of a square. A charge -q is placed at each of the oth

A 42 mH inductor is connected to $200 \mathrm{~V}, 50 \mathrm{~Hz}$ a.c. supply. The r.m.s. value of current in the circ

In Young's double slit experiment using monochromatic light of wavelength ' $\lambda$ ', the intensity of light at a poi

Which one of the following statements is true? A p-type semiconductor is doped with

The specific heat of argon at constant pressure and constant volume are $C_p$ and $C_v$ respectively. It's density ' $\r

The combination of NAND gates is shown in figure (I) and (II). For the given inputs, the outputs in both the combination