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Recent questions tagged 22
Questions
One litre of helium gas at a pressure of 76 cm-Hg and temperature $27^{\circ}C$ is heated till its pressure and volume are doubled. The final temperature attained by the gas is :
jeemain
physics
past papers
1998
22
asked
Dec 19, 2018
by
pady_1
0
answers
When a cylindrical tube is dipped vertically into a liquid then the angle of contact is $140^{\circ}$, if the tube is dipped, with an inclination of $40^{\circ}$ then angle of contact is :
jeemain
physics
past papers
1999
22
asked
Dec 19, 2018
by
pady_1
1
answer
If pressure $P$, velocity $v$ and time $T$ are taken as fundamental physical quantities the dimensional formula of the force is :
jeemain
physics
past papers
2000
22
asked
Dec 19, 2018
by
pady_1
0
answers
Thomson coefficient of a conductor is $10\; \mu\; VK$. The two ends of it are kept at $50^{\circ}C$ and $60^{\circ}C$ respectively. Amount of heat absorbed by the conductor when a charge of $10\; C$ flows through it, is :
jeemain
physics
past papers
2001
22
asked
Dec 11, 2018
by
pady_1
0
answers
If a current is passed through a spring then the spring will :
jeemain
physics
past papers
2002
22
asked
Dec 11, 2018
by
pady_1
0
answers
A boy playing on the roof of a 10 m high building throws a ball with a speed of 10 m/s at an angle of $30^{\circ}$ with the horizontal. How far from the throwing point will the ball be at the height of $10 \;m$ from the ground ? [$g = 10\; m/s^2, \; \sin 30^{\circ} = 1/2,\; \cos 30^{\circ} = \sqrt{3}/2]$
jeemain
physics
past papers
2003
22
asked
Dec 11, 2018
by
pady_1
0
answers
From a uniform circular disc of radius R and mass 9m, a small disc of radius $\frac{R}{3}$ is removed as shown in the figure. The moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through centre of disc is : <br>
jeemain
physics
past papers
2018
22
asked
Dec 11, 2018
by
pady_1
0
answers
The normal to the curve $y(x-2)(x-3) = x+6$ at the point where the curve intersects the y-axis passes through the point :
jeemain
math
past papers
2017
22
asked
Dec 11, 2018
by
pady_1
1
answer
Half-lives of two radioactive elements A and B are 20 minutes and 40 minutes, respectively. Initially, the samples have equal number of nuclei. After 80 minutes, the ratio of decayed numbers of A and B nuclei will be :
jeemain
physics
past papers
2016
22
asked
Dec 11, 2018
by
pady_1
0
answers
In the circuits (a) and (b) switches $S_1$ and $S_2$ are closed at $t = 0$ and are kept closed for a long time. The variation of currents in the two circuits for $t \geq 0$ are roughly shown by (figures are schematic and not drawn to scale) : <br>
jeemain
physics
past papers
2015
22
asked
Dec 11, 2018
by
pady_1
0
answers
There is a circular tube in a vertical plane. Two liquids which do not mix and of densities $d_1$ and $d_2$ are filled in the tube. Each liquid subtends $90^{\circ}$ angle at centre. Radius joining their interface makes an angle $\alpha$ with vertical. ratio $d_1/d_2$ is <br>
jeemain
physics
past papers
2014
22
asked
Dec 11, 2018
by
pady_1
0
answers
Which of the following represents the correct order of increasing first ionisation enthalpy for Ca, Ba, S, Se and Ar ?
jeemain
chemistry
past papers
2013
22
asked
Dec 11, 2018
by
pady_1
0
answers
If $z \neq 1$ and $\frac{z^2}{z-1}$ is real, then the point represented by the complex number $z$ lies
jeemain
math
past papers
2012
22
asked
Dec 11, 2018
by
pady_1
0
answers
If a wire is stretched to make it 0.1% longer, its resistance will :
jeemain
physics
past papers
2011
22
asked
Dec 11, 2018
by
pady_1
0
answers
Solubility product of silver bromide is $5.0 \times 10^{–13}$. The quantity of potassium bromide (molar mass taken as $120 \;g \;of\; mol^{–1}$) to be added to $1 \;litre\; of\; 0.05\; M$ solution of silver nitrate to start the precipitation of AgBr is
jeemain
chemistry
past papers
2010
22
asked
Dec 11, 2018
by
pady_1
0
answers
A transparent solid cylindrical rod has a refractive index of $\frac{2}{\sqrt{3}}$. It is surrounded by air. A light ray is incident at the mid point of one end of the rod as shown in the figure. The incident angle $\theta$ for which the light ray grazes along the wall of the rod is <br>
jeemain
physics
past papers
2009
22
asked
Nov 29, 2018
by
pady_1
0
answers
Let $f(x) = \left\{ \begin{array} {1 1} (x-1) \sin \bigg(\large\frac{ 1 }{x-1}\bigg),\normalsize & \quad\text{ if x \(\neq\) 1 }\\ 0 ,& \quad \text{if x =1}\\ \end{array} \right. $.Then which one of the following is true?
jeemain
math
past papers
2008
22
asked
Nov 29, 2018
by
pady_1
0
answers
The function $f(x) = \tan^{-1} (\sin x + \cos x) $ is an increasing function in :
jeemain
math
past papers
2007
22
asked
Nov 29, 2018
by
pady_1
0
answers
An alpha nucleus of energy $\frac{1}{2} mv^2$ bombards a heavy nuclear target of charge $Ze$. Then the distance of closest approach for the alpha nucleus will be proportional to :
jeemain
physics
past papers
2006
22
asked
Nov 13, 2018
by
pady_1
0
answers
The value of $a$ for which the sum of the squares of the roots of the equation $x^2 - (a-2)x -a - 1 = 0$ assume the least value is :
jeemain
math
past papers
2005
22
asked
Nov 5, 2018
by
pady_1
0
answers
Consider a car moving on a straight road with a speed of 100 m/s. The distance at which car can be stopped , is : $[\mu_k = 0.5]$
jeemain
physics
past papers
2005
22
asked
Nov 5, 2018
by
pady_1
0
answers
If $u = \sqrt{a^2 \cos^2 \theta +b^2 \sin^2 \theta} + \sqrt{a^2 \sin^2 \theta + b^2 \cos^2 \theta}$, then the difference between the maximum and minimum values of $u^2$ is given by
jeemain
math
past papers
2004
22
asked
Nov 5, 2018
by
pady_1
0
answers
A tuning fork is used to produce resonance in glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperture of $27^oC$ two successive resonances are produced at 20 cm and 73 cm of column length. If the frequency of the tuning fork is 320 Hz, the velocity of sound in air at $27^oC$ is
neet
physics
past papers
2018
22
asked
Aug 21, 2018
by
pady_1
1
answer
Which of the following is dependent on temperature ?
neet
chemistry
past papers
2017
22
asked
Aug 21, 2018
by
pady_1
1
answer
Natural rubber has :
neet
chemistry
past papers
2016
22
asked
Aug 21, 2018
by
pady_1
1
answer
A gas such as carbon monoxide would be most likely to obey the ideal gas law at :
neet
chemistry
past papers
2015
22
asked
Aug 21, 2018
by
pady_1
1
answer
A speeding motorcyclist sees traffic jam ahead of him. He slows down to 36km/hour. He finds that traffic has eased and a car moving ahead of him at 18 km/hour is honking at a frequency of 1392 Hz. If the speed of sound is 343 m/s, the frequency of the honk as heard by him will be:
neet
physics
past papers
2014
22
asked
Aug 20, 2018
by
pady_1
1
answer
A source of unknown frequency gives 4 beats/s, when sounded with a source of known frequency 250 Hz. The second harmonic of the source of unknown frequency gives five beats per second, when sounded with a source of frequency 513 Hz. The unknown frequency is -
neet
physics
past papers
2013
22
asked
Aug 20, 2018
by
pady_1
1
answer
The current (I) in the inductance is varying with time according to the plot shown in figure. Which one of the following is the correct variation of voltage with time in the coil ? <br>
neet
physics
past papers
2012
22
asked
Aug 20, 2018
by
pady_1
1
answer
The power obtained in a reactor using $U^{235}$ disintegration is 1000 kW. The mass decay of $U^{235}$ per hour is :
neet
physics
past papers
2011
22
asked
Aug 16, 2018
by
pady_1
1
answer
A particle of mass M is situated at the center of a spherical shell of same mass and radius a. The gravitational potential at a point situated at $\frac{a}{2}$ distance from the centre, will be –
neet
physics
past papers
2010
22
asked
Jul 26, 2018
by
pady_1
1
answer
The electric field part of an electromagnetic wave in a medium is represented by :$E_x=0$ <br> $E_y=2.5\frac{N}{C}cos[(2\pi\times10^6\frac{rad}{m})t-(\pi\times10^{-2}\frac{rad}{s})x]$ <br>$E_z=0$. The wave is :
neet
physics
past papers
2009
22
asked
Jul 26, 2018
by
pady_1
1
answer
The wave described by y = 0.25 sin (10 $\pi X$ – 2$\pi f$), where x and y are in metres and t in seconds, is a wave travelling along the -
neet
physics
past papers
2008
22
asked
Jul 26, 2018
by
pady_1
1
answer
A small coin is resting on the bottom of a beaker filled with a liquid. A ray of light from the coin travels upto the surface of the liquid and moves along its surface (see figure) <br> <br> How fast is the light traveling in the liquid ?
neet
physics
past papers
2007
22
asked
Jul 26, 2018
by
pady_1
1
answer
A photo-cell employs photoelectric effect to convert:-
neet
physics
past papers
2006
22
asked
Jul 25, 2018
by
pady_1
1
answer
An ideal gas heat engine operates in Carnot cycle between $227^{\circ}C$ and $127^{\circ}C$. It absorbs $6\times10 ^4$ cals of heat at higher temperature. Amount of heat converted to work is:-
neet
physics
past papers
2005
22
asked
Jul 24, 2018
by
pady_1
0
answers
In India electricity is supplied for domestic use at 220 V. It is supplied at 110 V in USA. If the resistance of a 60W bulb for use in India is R, The resistance of a 60W bulb for use in USA will be :-
neet
physics
past papers
2004
22
asked
Jul 24, 2018
by
pady_1
1
answer
Consider a compound slab consisting of two different materials having equal thicknesses and thermal conductivities K and 2K, respectively. The equivalent thermal conductivity of the slab is -
neet
physics
past papers
2003
22
asked
Jul 24, 2018
by
pady_1
1
answer
Number of atom per unit cell in B.C.C. : -
neet
physics
past papers
2002
22
asked
Jul 23, 2018
by
pady_1
1
answer
A ray of light travelling in air haves wavelength λ, frequency n, velocity v and intensity I. If this ray enters into water then these parameter are$\lambda', n' , v' and I'$ respectively. Which relation is correct?
neet
physics
past papers
2001
22
asked
Jul 20, 2018
by
pady_1
1
answer
A charge Q the electric flux passed through all the six faces of the cube is :
neet
physics
past papers
2000
22
asked
Jul 20, 2018
by
pady_1
1
answer
If time of mean position from amplitude (extreme) position is 6 s. then the frequency of SHM will be :
neet
physics
past papers
1998
22
asked
Jun 15, 2018
by
pady_1
1
answer
Pick the odd one out: SQUARE, RECTANGLE, TRIANGLE, CUBE
class5
math
olympiad
logical
analytical
reasoning
22
asked
Dec 31, 2015
by
pady_1
1
answer
Seth found some empty bins to put cans into for recycling. He put 2 empty cans in the first bin, 6 empty cans in the second bin, 18 empty cans in the third bin, 54 empty cans in the fourth bin, and 162 empty cans in the fifth bin. If this pattern continues, how many empty cans will Seth put in the sixth bin?
class5
math
olympiad
data handling
22
asked
Dec 31, 2015
by
pady_1
0
answers
The boundary of a factory is being repainted by a group of 8 workers. If 196.4 m of the boundary is already painted, and each worker can paint 6 m 100 mm of the boundary every hour, what is the total length of the boundary that would have been painted after an hour?
class5
math
olympiad
measurements
22
asked
Dec 31, 2015
by
pady_1
0
answers
A factory makes 212 bicycles every week. How many items are manufactured in $\large\frac{1}{2}$ year?
class5
math
olympiad
fractions
decimals
22
asked
Dec 31, 2015
by
pady_1
0
answers
What \% of 5.6 is 560?
class5
math
olympiad
computation
22
asked
Dec 31, 2015
by
pady_1
0
answers
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