## 1. A stone is dropped from a height h. It hits the ground with a certain momentum P. If the same stone is dropped from a height 100 % more than the previous height, the momentum when it hits the ground will change by -

AIPMT 2012 Laws Of Motion

## 2. A particle of mass M is situated at the centre of a spherical shell of same mass and radius a. The magnitude of the gravitational potential at a point situated at a/2 distannce from the centre, will be :

AIPMT 2010 Gravitation

## 3. An object radiates at temperature $127^{\circ} C$. Temperature. at which radiates 16 times more is

COMEDK 2007 Thermal Properties Of Matter

## 4. A ball falls from a height of 20 m on the floor and rebounds to a height of 5 m. Time of contact is 0.02 s. Find the acceleration during impact

Manipal 1980 Work, Energy And Power

## 5. Two sound sources $S_1$ and $S_2$ of frequencies 324 Hz and 320 Hz are placed at certain separation. An observer is moving away from $S_1$ and towards $S_2$ on line joining them. If he hears no beats then speed of observer is ( v = 344 $ms^{-1}$ )

Rajasthan PMT 2004 Electromagnetic Waves

## 6. To what depth below the surface of sea should a rubber ball be taken as to decrease its volume by 0.1 % ? (Take density of sea water =1000 kg$m^{-3},$ Bulk modulus of rubber = 9 x $10^8 Nm^{-2}$ ,acceleration due to gravity = 10 m$s^{-2})$

KEAM 2006 Mechanical Properties Of Solids

## 7. The vectors A and B are such that $\hspace30mm | A + B| = |A - B|$ The angle between the two vectors is

Haryana PMT 2003 Motion In A Plane

## 8. The radioactivity of a sample is x at time $t_1$ and is y at time $t_2$. If the mean life of the specimen is $\tau$, the number of atcms that have disintegrated in the time interval $(t_2 - t_1)$ is

Gujarat CET 2006 Nuclei

## 9. A conducting circular loop of radius r carries a constant current i . It is placed in a uniform magnetic field $B_0$ such that $B_0$ is perpendicular to the plane of the loop. The magnetic force acting on the loop is

IIT JEE 1983 Moving Charges And Magnetism

## 10. Newton's law of cooling holds good only, if the temperature difference between the body and the surroundings is

Maharashtra CET 2006 Thermal Properties Of Matter

## 11. Ablockofbase $l0 cm\times10 cm$ and height 15 cm is kept on an inclined plane. The coefficient of friction between them is $\sqrt3$. The inclination $\theta$ of this inclined plane from the horizontal plane is gradually increased from 0$^{\circ}$. Then

IIT JEE 2009 System Of Particles And Rotational Motion

AIPMT 1992 Atoms

## 13. If the gravitational force of earth suddenly disappears, then which of the following is correct?

COMEDK 2000 Gravitation

## 14. In the figure, a ladder of mass m is shown leaning against a wall. It is in static equilibrium making an angle $\theta$ with the horizontal floor. The coefficient of friction between the wall and the ladder is $\mu_1$ and that between the floor and the ladder is $\mu_2$ The normal reaction of the wall on the ladder is $N_1$ and that of the floor is $N_2$ If the ladder is about to slip, then

JEE Advanced 2014 Laws Of Motion

## 15. An object is immersed in a fluid. In order that the object becomes invisible, it should

AIIMS 2004 Ray Optics And Optical Instruments

## 16. A particle of mass M, starting from rest, undergoes uniform acceleration. If the speed acquired in time T is V, the power delivered to the particle is

AIPMT 2010 Work, Energy And Power

## 17. A bar magnet of magnetic moment $M$ is placed at right angles to a magnetic induction $B$. If a force $F$ is experienced by each pole of the magnet, the length of the magnet will be

NEET 2013 Magnetism And Matter

## 18. If the colour code of carbon resistor is as follows, then give the value of its resistance in $k \, \Omega$, Colour of I strip-yellow Colour of II strip-blue Colour of III strip-orange Colour of IV strip-gold

Delhi UMET 2008 Electromagnetic Induction

## 19. In the phenomenon of interference, energy is

J & K CET 2005 Wave Optics

## 20. In a double-slit experiment, the two slits are separated by one millimeter and the screen is placed one meter away. The fringe separation for blue green light of wavelength 500 mm is

J & K CET 2011 Wave Optics

## 21. A particle executes simple harmonic motion with a frequency f. The frequency with which its kinetic energy oscillates is

IIT JEE 1987 Oscillations

## 22. The inversion temperature of a copper-iron thermocouple is $540^\circ C$ when the cold junction temperature is $0^\circ C$. If the cold junction temperature is increased by $10^\circ C,$ then the inversion temperature and the neutral temperature of the thermocouple respectively are

Manipal 1980 Electromagnetic Induction

## 23. At 0$\circ$C\, the densities of a cork and a liquid, at which the cork floats are $S_1$ and $S_2$ respectively. The coefficients of expansion of the material of the cork and the liquid are 100 y and $100\gamma$ and $\gamma$ respectively. If the cork sinks when temperature of the liquid is t$^{\circ}$C, then the $\left(\frac{\rho_2}{\rho_1}\right)$ is

EAMCET 2004 Thermal Properties Of Matter

## 24. The coercivity of a small magnet where the ferromagnet gets demagnetised is $3\times {10}^3 Am^{-1}$ . The current required to be passed in a solenoid of length 10 cm and number of turns 100, so that the magnet gets demagnetised when inside the solenoid is

JEE Main 2014 Moving Charges And Magnetism

## 25. A body is moved along a straight line by a machine delivering constant power. The distance moved by the body in time t is proportional to

IIT JEE 1984 Work, Energy And Power

## 26. Figure shows the variation of energy with the orbit radius r of a satellite in a circular motion. Mark the correct statement.

AIIMS 2008 Gravitation

## 27. Moment of inertia of a uniform circular disc about a diameter is I. Its moment of inertia about an axis perpendicular to its plane and passing through a point on its rim will be

AIPMT 1990 System Of Particles And Rotational Motion

## 28. LCD stands for

COMEDK 2012 Semiconductor Electronics: Materials Devices And Simple Circuits

## 29. Two radioactive materials A and B have decay constants $10 \lambda$ and $\lambda$ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of A to that of B will be 1/e after a time

Haryana PMT 2005 Nuclei

KCET 2012 Atoms