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Recent questions tagged 33
Questions
Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region ?
neet
chemistry
past papers
2019
33
asked
Jul 8, 2019
by
pady_1
2
answers
The null points are on the equatorial line of a bar magnet when the north pole of the magnet is pointing :
jeemain
physics
past papers
1998
33
asked
Dec 19, 2018
by
pady_1
0
answers
The least distance of distinct vision is 25 cm. If the focal length of convex lens is 10 cm, it acts as a simple microscope of maximum magnification :
jeemain
physics
past papers
1999
33
asked
Dec 19, 2018
by
pady_1
0
answers
A wheel has a speed of $1200$ revolution per minute and is made to slow down at a rate of $4\; radian/sec^2$. The number of revolutions it makes before coming to rest is :
jeemain
physics
past papers
2000
33
asked
Dec 19, 2018
by
pady_1
0
answers
An electron moes with speed $2 \times 10^5\; m/s$ along the positive $x$-direction in the presence of a magnetic field of induction $\overrightarrow{B} = \hat{i} + 4 \hat{j} - 3 \hat{k}$ (in tesla). The magnitude of the force experienced by the electron in newtons is : <br> (Charge on the electron =$1.6 \times 10^{-19}C$)
jeemain
physics
past papers
2001
33
asked
Dec 11, 2018
by
pady_1
0
answers
By increasing the temperature, the specific resistance of a conductor and a semiconductor :
jeemain
physics
past papers
2002
33
asked
Dec 11, 2018
by
pady_1
0
answers
A wire suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1 mm. Then the elastic energy stored in the wire is :
jeemain
physics
past papers
2003
33
asked
Dec 11, 2018
by
pady_1
0
answers
If $\alpha, \; \beta \in C$ are the distinct roots, of the equation $x^2 - x + 1 = 0$, then $\alpha^{101} + \beta^{107} $ is equal to :
jeemain
math
past papers
2018
33
asked
Dec 11, 2018
by
pady_1
1
answer
An electron bean is acceleration by a potential difference $V$ to hit a metallic target to produce X-rays. It produces continuous as well as characteristic X-rays. If $\lambda_{min}$ is the smallest possible wavelength of X-ray in the spectrum, the variation of log $\lambda_{min}$ with $\log\; V$ is correctly represented in :
jeemain
physics
past papers
2017
33
asked
Dec 11, 2018
by
pady_1
0
answers
A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference $V$ esu. If $e$ and $m$ are charge and mass of an electron, respectively, then the value of $h/ \lambda$ (where $\lambda$ is wavelength associated with electron wave) is given by :
jeemain
chemistry
past papers
2016
33
asked
Dec 11, 2018
by
pady_1
0
answers
If the principal quantum number n56, the correct sequence of filling of electrons will be :
jeemain
chemistry
past papers
2015
33
asked
Dec 11, 2018
by
pady_1
0
answers
If $a \in R$ and the equation $-3(x - [x])^2 + 2 (x - [x]) + a^2 = 0$ (where $[x]$ denotes the greatest integer $\leq x$) has no integral solution, then all possible values of a lie in the interval
jeemain
math
past papers
2014
33
asked
Dec 11, 2018
by
pady_1
1
answer
Given : A circle, $2x^2 + 2y^2 = 5 $ and a parabola. $y^2 = 4 \sqrt{5} x$. <br> Statement - I : An equation of a common tangent to these curves is $y = x+\sqrt{5}$. <br> Statement - II : If the line, $y = mx + \frac{\sqrt{5}}{m} (m \neq 0)$is their common tangent, then m satisfies $m^4 - 3m^2 +2 = $
jeemain
math
past papers
2013
33
asked
Dec 11, 2018
by
pady_1
1
answer
In a uniformly charged sphere of total charge Q and radius R, the electric field E is plotted as a function of distance from the centre. The graph which would correspond to the above will be
jeemain
physics
past papers
2012
33
asked
Dec 11, 2018
by
pady_1
0
answers
The coefficient of $x^7$ in the expansion of $(1 - x - x^2 + x^3)^6$ is
jeemain
math
past papers
2011
33
asked
Dec 11, 2018
by
pady_1
0
answers
Statement-1 : Two particles moving in the same direction do not lose all their energy in a completely inelastic collision. Statement-2 : Principle of conservation of momentum holds true for all kinds of collisions.
jeemain
physics
past papers
2010
33
asked
Dec 11, 2018
by
pady_1
0
answers
Arrange the carbanions, $(CH_3)_3 \overline{C}, \;\overline{C}Cl_3, (CH_3)_2 \overline{C}H, \;C_6H_5 \overline{C}H_2,$ in order of thier decreasing stability :
jeemain
chemistry
past papers
2009
33
asked
Nov 29, 2018
by
pady_1
0
answers
27. Let a, b, c be any real numbers. Suppose that there are real numbers x, y, z not all zero such that x = cy + bz, y = az + cx and z = bx + ay. Then $a^2 + b^2 + c^2 + 2abc$ is equal to
jeemain
math
past papers
2008
33
asked
Nov 29, 2018
by
pady_1
0
answers
If one of the lines of $my^2 + (1 - m^2) xy - mx^2 = 0 $ is a bisector of the angle between the lines $xy = 0$, then $m$ is :
jeemain
math
past papers
2007
33
asked
Nov 29, 2018
by
pady_1
0
answers
If the ratio of the concentration of electrons to that of holes in a semiconductor is $\frac{7}{5}$ and the ratio of currents is $\frac{7}{4}$, then what is the ratio of their drift velocities ?
jeemain
physics
past papers
2006
33
asked
Nov 13, 2018
by
pady_1
0
answers
A function is matched below against an interval where it is supposed to be increasing. Which of the following pairs is incorrectly matched ? <br>
jeemain
math
past papers
2005
33
asked
Nov 5, 2018
by
pady_1
0
answers
The temperature-entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is : <br>
jeemain
physics
past papers
2005
33
asked
Nov 5, 2018
by
pady_1
0
answers
The normal to the curve $x = a (1+ \cos \theta)\; y = a \; sin \theta$ at $'\theta'$ always passes through the fixed point
jeemain
math
past papers
2004
33
asked
Nov 5, 2018
by
pady_1
0
answers
A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If screw gauge has a zero error of -0.004 cm, the correct diameter of the ball is
neet
physics
past papers
2018
33
asked
Aug 21, 2018
by
pady_1
1
answer
A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy $\Delta U$ of the gas in joules will be -
neet
chemistry
past papers
2017
33
asked
Aug 21, 2018
by
pady_1
1
answer
In the correct <br> $X - C \equiv CH \xrightarrow[\text{(2) $CH_3CH_2Br$}]{\text{(1) $NaNH_2 / liq. NH_3$}} X \xrightarrow[\text{(2) $CH_3CH_2Br$}]{\text{$(1) NaNH_2 / liq.NH_3$}}$ <br> X and Y are:
neet
chemistry
past papers
2016
33
asked
Aug 21, 2018
by
pady_1
1
answer
Which one of the following esters gets hydrolysed most easily under alkaline conditions -
neet
chemistry
past papers
2015
33
asked
Aug 21, 2018
by
pady_1
1
answer
A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A the voltage across the secondary coil and the current in the primary coil respectively are:
neet
physics
past papers
2014
33
asked
Aug 20, 2018
by
pady_1
1
answer
The condition under which a microwave oven heats up a food item containing water molecules most efficiently is -
neet
physics
past papers
2013
33
asked
Aug 20, 2018
by
pady_1
1
answer
Two similar coils of radius R are lying concentrically with their planes at right angles to each other.The currents flowing in them are I and 2I, respectively. The resultant magnetic field induction at the centre will be
neet
physics
past papers
2012
33
asked
Aug 20, 2018
by
pady_1
1
answer
Out of the following functions representing motion of a particle which represents SHM : <br> (A) $y = \sin \omega t - \cos \omega t $ <br> (B) $ y = \sin^3 \omega t $ <br> (C) $ y = 5 \cos (\frac{3 \pi}{4} - 3 \omega t)$ <br> (D) $ y = 1 + \omega t + \omega^2 t^2$
neet
physics
past papers
2011
33
asked
Aug 16, 2018
by
pady_1
1
answer
A man of 50 kg mass is standing in a gravity free space at a height of 10 m above the floor. He throws a stone of 0.5 kg mass downwards with a speed 2 m/s. When the stone reaches the floor, the distance of the man above the floor will be –
neet
physics
past papers
2010
33
asked
Jul 26, 2018
by
pady_1
1
answer
Under the influence of a uniform magnetic field, a charged particle moves with constant speed V in a circle of radius R. The time period of rotation of the particle :
neet
physics
past papers
2009
33
asked
Jul 26, 2018
by
pady_1
1
answer
Curie temperature is the temperature above which -
neet
physics
past papers
2008
33
asked
Jul 26, 2018
by
pady_1
1
answer
A charged particle (charge q) is moving in a circle of radius R with uniform speed v. The associated magnetic moment $\mu$ is given by:
neet
physics
past papers
2007
33
asked
Jul 26, 2018
by
pady_1
1
answer
The molar specific heat at constant pressure of an ideal gas is $[\frac 7 2]R$. The ratio of specific heat at constant pressure to that at constant volume is:-
neet
physics
past papers
2006
33
asked
Jul 25, 2018
by
pady_1
1
answer
A drum of radius R and mass M, rolls down without slipping along an inclined plane of angle ?. The frictional force-
neet
physics
past papers
2005
33
asked
Jul 24, 2018
by
pady_1
1
answer
The phase difference between two waves, <br> $y_{1}=10^{-6} \sin \{100t+(x/50)+0.5\}m$ <br> $y_2=10^{-6} \cos \{100t+(\frac{ x} {50})\}m$ <br> Where X is expressed in metres and t is expressed in seconds, is approximately : -
neet
physics
past papers
2004
33
asked
Jul 24, 2018
by
pady_1
1
answer
Solar energy is mainly caused due to :
neet
physics
past papers
2003
33
asked
Jul 24, 2018
by
pady_1
1
answer
A whistle revolves in a circle with angular speed $\omega$ = 20 rad/sec using a string of length 50 cm. If the frequency of sound from the whistle is 385 Hz, then what is the minimum frequency heard by an observer which is far away from the centre : - ($V_{sound }= 340 m/s$)
neet
physics
past papers
2002
33
asked
Jul 23, 2018
by
pady_1
1
answer
A disc is rolling the velocity of its centre of mass is $V_cm$ then which one will be correct :-
neet
physics
past papers
2001
33
asked
Jul 20, 2018
by
pady_1
1
answer
The bob of simple pendulum having length l, is displaced from mean position to an angular position $\theta$ with respect to vertical. If it is released, then velocity of bob at lowest position :
neet
physics
past papers
2000
33
asked
Jul 20, 2018
by
pady_1
1
answer
For the diffraction from a crystal with $\lambda$ = 1Å and Bragg's angle $\theta$ = 60°, then for the second order diffraction 'd' will be :
neet
physics
past papers
1998
33
asked
Jun 15, 2018
by
pady_1
1
answer
Which of the following letters does not have the vertical line of symmetry?
class5
math
olympiad
data handling
33
asked
Dec 31, 2015
by
pady_1
1
answer
Tori's lounge is 8 metres wide and 8 metres long. She wants to install red carpet that costs ₹328.00 per square metre. How much will it cost to buy enough carpet for the lounge?
class5
math
olympiad
measurements
33
asked
Dec 31, 2015
by
pady_1
0
answers
A factory makes 11596 shirts every week. How many items are manufactured in $\large\frac{23}{26}$ year?
class5
math
olympiad
fractions
decimals
33
asked
Dec 31, 2015
by
pady_1
0
answers
What \% is 86 of 2580?
class5
math
olympiad
computation
33
asked
Dec 31, 2015
by
pady_1
0
answers
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