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Recent questions tagged 17
Questions
The most suitable reagent for the following conversion is :-
neet
chemistry
past papers
2019
17
asked
Jul 10, 2019
by
pady_1
1
answer
The Poisson's ratio $\sigma$ should satisfy the relation :
jeemain
physics
past papers
1998
17
asked
Dec 19, 2018
by
pady_1
0
answers
Taking that earth revolves round the sun in a circular orbit of radius $15 \times 10^{10}m$, with a time period of 1 year the time taken by another planet, which is at a distance of $540 \times 10^{10}m$, to revolve round the sun in circular orbit once, will be :
jeemain
physics
past papers
1999
17
asked
Dec 19, 2018
by
pady_1
1
answer
The ratio of the longest and shortest wave-lengths in Bracket series of hydrogen spectra is :
jeemain
physics
past papers
2000
17
asked
Dec 19, 2018
by
pady_1
0
answers
The pressure and density of a diatomic gas $(\gamma = \frac{7}{5} )$ changes adiabatically from $(P, d)$ to $(P', d')$. If $\frac{d'}{d} =32$. Then $\frac{P'}{P}$ is :
jeemain
physics
past papers
2001
17
asked
Dec 11, 2018
by
pady_1
0
answers
If a spring has time period T, and is cut into $n$equal parts, then the time period of each part will be :
jeemain
physics
past papers
2002
17
asked
Dec 11, 2018
by
pady_1
0
answers
Which of the following radiations has the least wavelength ?
jeemain
physics
past papers
2003
17
asked
Dec 11, 2018
by
pady_1
0
answers
In a potentiometer experiment, it is found that no current passes through the galvanometer when the terminals of the cell are connected across 52 cm of the potentiometer wire. If the cell is shunted by resistance of $5 \Omega$, a balance is found when the cell is connected across 40 cm of the wire. Find the internal resistance of the cell.
jeemain
physics
past papers
2018
17
asked
Dec 11, 2018
by
pady_1
0
answers
The eccentriciy of an ellipse whose centre is at the origin is $\frac{1}{2}$. If one of its directrices is $x = -4$, then the equation of the normal to it at $(1, \frac{3}{2})$ is
jeemain
math
past papers
2017
17
asked
Dec 11, 2018
by
pady_1
1
answer
An arc lamp requires a direct current of 10 A at 80 V to function. If it is connected to a 220 V (rms), 50 Hz AC supply, the series inductor needed for it to work is close to :
jeemain
physics
past papers
2016
17
asked
Dec 11, 2018
by
pady_1
0
answers
Suppose the drift velocity $v_{_d}$ in a material varied with the applied electric field $E$ as $v_{_d} \propto \sqrt{E}$ ; . Then $V - I$ graph for a wire made of such a material is best given by :
jeemain
physics
past papers
2015
17
asked
Dec 11, 2018
by
pady_1
0
answers
One mole of diatomic ideal gas undergoes a cyclic process ABC as shown in figure. The process BC is adiabatic. The temperatures at A, B and C are 400 K, 800 K and 600 K respectively. Choose the correct statement: <br>
jeemain
physics
past papers
2014
17
asked
Dec 11, 2018
by
pady_1
0
answers
Synthesis of each molecule of glucose in photosynthesis involves :
jeemain
chemistry
past papers
2013
17
asked
Dec 11, 2018
by
pady_1
0
answers
The area bounded between the parabolas $x^2 = \frac{y}{4}$ and $x^2= 9y$ and the straight line $y = 2$ is
jeemain
math
past papers
2012
17
asked
Dec 11, 2018
by
pady_1
0
answers
This question has Statement-1 and Statement-2. Of the four choices given after the statements, choose the one that best describes the two statements. <br> Statement-1 : Sky wave signals are used for long distance radio communication. These signals are in general, less stable than ground wave signals. <br> Statement-2: The state of ionosphere varies from hour to hour, day to day and season to season
jeemain
physics
past papers
2011
17
asked
Dec 11, 2018
by
pady_1
0
answers
Three reactions involving $H_2 PO_4^{-}$ are given below :$(i)H_3PO_4+H_2O \to H_3O^{+} +H_2PO_4^{-} \qquad (ii) H_2PO_4^{-}+H_2O \to HPO_4^{2-}+H_3O^{+} \qquad (iii)H_2PO_4^{-}+OH^{-} \to H_3PO_4+O^{2-}$ <br>In which of the above does $H_2PO_4^{-}$ act as an acid ?
jeemain
chemistry
past papers
2010
17
asked
Dec 11, 2018
by
pady_1
0
answers
A particle has an initial velocity $3 \hat{i} + 4 \hat{j}$ and an acceleration of $0.4 \hat{i} + 0.3 \hat{j}$. Its speed after 10 s is
jeemain
physics
past papers
2009
17
cbse11
ch2
motion-in-straight-line
asked
Nov 29, 2018
by
pady_1
1
answer
Statement - 1: For every natural number $n\geq 2$ ,$\frac{1}{\sqrt{1}}+\frac{1}{\sqrt{2}}+$........$+\frac{1}{\sqrt{n}}>\sqrt{n}$ <br> Statement -2: For every natural number $n\geq 2$ $\sqrt{{n}({n+1})}$
jeemain
math
past papers
2008
17
asked
Nov 29, 2018
by
pady_1
0
answers
Two aeroplanes I and II bomb a target in succession. The probabilities of I and II scoring a hit correctly are 0.3 and 0.2, respectively. The second plane will bomb only if the first misses the target. The probability that the target is hit by the second plane is :
jeemain
math
past papers
2007
17
asked
Nov 29, 2018
by
pady_1
1
answer
Consider a two particle system with particles having masses $m_1$ and $m_2$. If the first particle is pushed towards the centre of mass through a distance d, by what distance should the second particle be moved, so as to keep the centre of mass at the same position ?
jeemain
physics
past papers
2006
17
asked
Nov 13, 2018
by
pady_1
0
answers
Let $ f : (-1, 1) \to B$ be a function defined by$f(x) = \tan^{-1} \frac{2x}{1-x^2}$, then $f$ is both one-one and onto when $B$ is the interval :
jeemain
math
past papers
2005
17
asked
Nov 5, 2018
by
pady_1
0
answers
A mass m moves with a velocity $\nu$ and collides inelastically with another identical mass. After collision the $I^{st}$ mass moves with velocity $\frac{\nu}{\sqrt{3}}$ in a direction perpendicular to the initial direction of motion. Find the speed of the second mass after collision :
jeemain
physics
past papers
2005
17
asked
Nov 5, 2018
by
pady_1
0
answers
If $S_n =\displaystyle\sum_{r=0}^{n} \frac{1}{^nC_r}$ and $t_n= \displaystyle\sum_{r=0}^{n} \frac{r}{^nC_r}$, then $\frac{t_n}{S_n}$ is equal to
jeemain
math
past papers
2004
17
asked
Nov 5, 2018
by
pady_1
0
answers
In a p-n junction diode, change in temperature due to heating
neet
physics
past papers
2018
17
asked
Aug 21, 2018
by
pady_1
1
answer
Mixture of chloroxylenol and terpineol acts as :
neet
chemistry
past papers
2017
17
asked
Aug 21, 2018
by
pady_1
1
answer
Which is the correct statement for the given acids ?
neet
chemistry
past papers
2016
17
asked
Aug 21, 2018
by
pady_1
1
answer
The vacant space in bcc lattice unit cell is :
neet
chemistry
past papers
2015
17
asked
Aug 21, 2018
by
pady_1
1
answer
A mono atomic gas at a pressure P, having a volume V expands isothermally to a volume 2V and then adiabatically to a volume 16V. The final pressure of the gas is : (take $\gamma = 5/3$)
neet
physics
past papers
2014
17
asked
Aug 20, 2018
by
pady_1
1
answer
During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its temperature. The ratio of $\frac{C_p}{C_v}$ for the gas is -
neet
physics
past papers
2013
17
asked
Aug 20, 2018
by
pady_1
1
answer
One mole of an ideal gas goes from an initial state A to final state B via two processes : It firs undergoes isothermal expansion from volume V to 3V and then its volume is reduced from 3toVat constant pressure. The correct P-V diagram representing the two processes is:
neet
physics
past papers
2012
17
asked
Aug 20, 2018
by
pady_1
1
answer
A parallel plate condenser have a uniform electric field $E(V/m)$ in the space between the plates. If the distance between the plates is $d(m)$ and area of each plate is $A(m^2)$ the energy (joules) stored in the condenser is :
neet
physics
past papers
2011
17
asked
Aug 16, 2018
by
pady_1
1
answer
Which one of the following bonds produces a n solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has high melting point ?
neet
physics
past papers
2010
17
asked
Jul 26, 2018
by
pady_1
1
answer
A black body at $227^{\circ}C$ radiates heat at the rate of $7cals/cm^{2}s$. At a temperature of $727^{\circ}C$, the rate of heat radiated in the same units will be :
neet
physics
past papers
2009
17
asked
Jul 26, 2018
by
pady_1
1
answer
A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly :
neet
physics
past papers
2008
17
asked
Jul 26, 2018
by
pady_1
1
answer
The frequency of a light wave in a material is $2 \times 10^{14}$ Hz and wavelength is $5000$ Å. The refractive index of material will be:-
neet
physics
past papers
2007
17
asked
Jul 26, 2018
by
pady_1
1
answer
The velocity v of a particle at time t is given by $V=at+\frac{b}{t+c}$, where a, b and c are constants. t + c The dimensions of a, b and c are respectively:-
neet
physics
past papers
2006
17
asked
Jul 25, 2018
by
pady_1
1
answer
The ratio of the dimension of Planck's constant and that of the moment of inertia is the dimension of :
neet
physics
past papers
2005
17
asked
Jul 24, 2018
by
pady_1
2
answers
A mass of 0.5 kg moving with a speed of 1.5 m/s on a horizontal smooth surface, collides with a nearly weightless spring of force constant k = 50 N/m. The maximum compression of the spring would be :- <br>
neet
physics
past papers
2004
17
asked
Jul 24, 2018
by
pady_1
1
answer
A particle of mass m oscillates with simple harmonic motion between points $x_1$ and $x_2$, the equilibrium position being O. Its potential energy is plotted. It will be as given below in the graph :
neet
physics
past papers
2003
17
asked
Jul 24, 2018
by
pady_1
1
answer
Which of the following is best close to an ideal black body : -
neet
physics
past papers
2002
17
asked
Jul 23, 2018
by
pady_1
2
answers
A cricketer catches a ball of mass 150 gm in 0.1 second moving with speed $20 ms^{-1}$. Then he experiences force of :-
neet
physics
past papers
2001
17
asked
Jul 20, 2018
by
pady_1
1
answer
To find out degree of freedom, the correct expression is :
neet
physics
past papers
2000
17
asked
Jul 20, 2018
by
pady_1
1
answer
A small ball is suspended from a thread. It is lifted up with an acceleration $4.9 ms^{–2}$ and lowered with an acceleration $4.9 ms^{–2}$ then the ratio of tensions in the thread in both cases will be :
neet
physics
past papers
1998
17
asked
Jun 15, 2018
by
pady_1
0
answers
Pick the odd one out TITAN, MERCURY, EARTH, JUPITER
class5
math
olympiad
logical
analytical
reasoning
17
asked
Dec 31, 2015
by
pady_1
1
answer
The chart shows production of different vegetables in a farm. If production of onion was 13500 Kg, find the production of cauliflower.
class5
math
olympiad
data handling
17
asked
Dec 31, 2015
by
pady_1
0
answers
Find the area of a rectangular field whose length is 100 m and breadth is 76 m.
class5
math
olympiad
measurements
17
asked
Dec 31, 2015
by
pady_1
0
answers
Find the Product $5 \large\frac{1}{3} \times \large\frac{2}{5}$
class5
math
olympiad
fractions
decimals
17
asked
Dec 31, 2015
by
pady_1
0
answers
There were 3125 students in a school last year. This year 167 students joined kindergarden and 366 students passed out and joined college. Also, 382 students transferred out to other schools, and 319 students transferred in from other schools. How many students are there in the school now?
class5
math
olympiad
computation
17
asked
Dec 31, 2015
by
pady_1
0
answers
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