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Recent questions tagged 16
Questions
The compound that is most difficult to protonate is:-
neet
chemistry
past papers
2019
16
asked
Jul 10, 2019
by
pady_1
1
answer
The equation of motion of a particle is given by $\frac{dp}{dt} + m \omega^2 n = 0$, where $p$ is the momentum and $n$ is the position. Then the particle :
jeemain
physics
past papers
1998
16
asked
Dec 19, 2018
by
pady_1
0
answers
The moment of inertia of a thin uniform rod of mass $M$ and length $L$ about an axis perpendicular to the rod, through its center is $I$. The moment of inertia of the rod about axis perpendicular to the rod through its end point is :
jeemain
physics
past papers
1999
16
asked
Dec 19, 2018
by
pady_1
0
answers
The energy of an X-ray photon of wavelength $1.65 \mathring{A}$ is : ($h = 6.6 \times 10^{-34} Js, \; c = 3 \times 10^8 ms^{-1}, \; 1eV = 1.6 \times 10^{-19}J$)
jeemain
physics
past papers
2000
16
asked
Dec 19, 2018
by
pady_1
0
answers
The wavelength of maximum intensity of radiation emitted by a star is $289.8\;nm$. The radiation intensity of the star is : <br> (Stefan's contant = $5.67 \times 10^{-8} \;Wm^2K^{-4}$, constant $b = 2898\; \mu m K$)
jeemain
physics
past papers
2001
16
asked
Dec 11, 2018
by
pady_1
0
answers
Energy required to move a body of mass $m$ from an orbit of radius $2R$ and $3R$ is :
jeemain
physics
past papers
2002
16
asked
Dec 11, 2018
by
pady_1
0
answers
A particle performing uniform circular motion has angular momentum L. If its angular frequency is doubled and its kinetic energy halved, then the new angular momentum is :
jeemain
physics
past papers
2003
16
asked
Dec 11, 2018
by
pady_1
0
answers
Seven identical circular planar disks, each of mass M and radius R are welded symmetrically as shown. The moment of inertia of the arrangement about the axis normal to the plane and passing through the point P is :<br>
jeemain
physics
past papers
2018
16
asked
Dec 11, 2018
by
pady_1
0
answers
Let $I_n = \int \tan^n x\; dx, \; (n > 1)$. If $I_4 + I_6 = a \tan^5 x + bx^5 + C$, where $C$ is a constant of integration, then the ordered pair $(a, b)$ is equal to
jeemain
math
past papers
2017
16
asked
Dec 11, 2018
by
pady_1
1
answer
Hysteresis loops for two magnetic materials A and B are given below : <br> <br> These materials are used to make magnets for electric generators, transformer core and electromagnet core. Then it is proper to use :
jeemain
physics
past papers
2016
16
asked
Dec 11, 2018
by
pady_1
0
answers
If the capacitance of a nanocapacitor is measured in terms of a unit $'u'$ made by combining the electronic charge $'e'$, Bohr radius $'a_0$, Planck's constant $'h'$ and speed of light $'c'$ then :
jeemain
physics
past papers
2015
16
asked
Dec 11, 2018
by
pady_1
0
answers
A mass â€˜mâ€™ is supported by a massless string wound around a uniform hollow cylinder of mass m and radius R. If the string does not slip on the cylinder, with what acceleration will the mass fall on release? <br>
jeemain
physics
past papers
2014
16
asked
Dec 11, 2018
by
pady_1
0
answers
The rate of a reaction doubles when its temperature changes from 300 K to 310 K. Activation energy of such a reaction will be : <br> ($ R = 8.314 \; JK^{-1} mol^{-1}$ and $log\;2 = 0.301$)
jeemain
chemistry
past papers
2013
16
asked
Dec 11, 2018
by
pady_1
0
answers
Let $a, b \in R$ be such that the function $f$ given by $f(x) = In \; |x| + bx^2 + ax, \; \; x \neq 0$ has extreme values at $x = -1$ and $x = 2$ <br> Statement 1 : $f$ has focal maximum at $x = -1$ and at $x = 2$ <br> Statement 2 : $ a = \frac{1}{2}$ and $b = \frac{-1}{4}$
jeemain
math
past papers
2012
16
asked
Dec 11, 2018
by
pady_1
0
answers
Water is flowing continuously from a tap having an internal diameter $8 \times 10^{-3}$m. The water velocity as it leaves the tap is $0.4\; ms^{-1}$. The diameter of the water stream at a distance $2 \times 10^{-1}$ m below the lap is close to :
jeemain
physics
past papers
2011
16
asked
Dec 11, 2018
by
pady_1
0
answers
The main product of the following reaction is $C_6H_5CH_2CH(OH)CH(CH_3)_2 \qquad \underrightarrow{\qquad conc.H_2SO_4 \qquad} \qquad ?$
jeemain
chemistry
past papers
2010
16
asked
Dec 11, 2018
by
pady_1
0
answers
The surface of a metal is illuminated with the light of 400 nm. The kinetic energy of the ejected photoelectrons was found to be 1.68 eV. The work function of the metal is (hc = 1240 eV nm)
jeemain
physics
past papers
2009
16
asked
Nov 29, 2018
by
pady_1
0
answers
If the straight lines $\frac{x-1}{k}=\frac{y-2}{2}=\frac{z-3}{3}$ and $\frac{x-2}{3}=\frac{y-3}{k}=\frac{z-1}{2}$ intersect at a point, then the integer k is equal to
jeemain
math
past papers
2008
16
asked
Nov 29, 2018
by
pady_1
0
answers
The resultant of two forces $P \;N$ and $3\; N$ is a force of $7\; N$. If the direction of the $3\; N$ force were reversed, the resultant would be $\sqrt{19} N$. The value of $P$ is :
jeemain
math
past papers
2007
16
asked
Nov 29, 2018
by
pady_1
0
answers
A string is stretched between fixed points separated by 75.0 cm. It is observed to have resonant frequencies of 420 Hz and 315 Hz. There are no other resonant frequencies between these two. Then, the lowest resonant frequency for this string is :
jeemain
physics
past papers
2006
16
asked
Nov 13, 2018
by
pady_1
0
answers
If the coefficient of $x^7$ in $\begin{bmatrix} ax^2 + \begin{pmatrix} \frac{1}{bx} \end{pmatrix} \end{bmatrix}^{11} $ equals the coefficient of $x^{-7}$ in $\begin{bmatrix} ax^2 - \begin{pmatrix} \frac{1}{bx} \end{pmatrix} \end{bmatrix}^{11} $, then $a$ and $b$ satisfy the relation :
jeemain
math
past papers
2005
16
asked
Nov 5, 2018
by
pady_1
0
answers
The block of mass M moving on the frictionless horizontal surface collides with the spring of spring constant $k$ and compresses it by length $L$. The maximum momentum of the block after collision is : <br>
jeemain
physics
past papers
2005
16
asked
Nov 5, 2018
by
pady_1
0
answers
The coefficient of $x^n$ in expansion of $(1+x)(1-x)^n$ is
jeemain
math
past papers
2004
16
asked
Nov 5, 2018
by
pady_1
0
answers
In the circuit shown in the figure, the input voltage $V_i$ is 20 V, $V_{BE}$ = 0 and $V_{CE}$ = 0. The value of $I_B, \; I_C$ and $\beta$ are given by <br>
neet
physics
past papers
2018
16
asked
Aug 21, 2018
by
pady_1
1
answer
Match the interhalogen compounds of column I with the geometry in column II and assign the correct code . <br>
neet
chemistry
past papers
2017
16
asked
Aug 21, 2018
by
pady_1
1
answer
Which of the following is an analgesic ?
neet
chemistry
past papers
2016
16
asked
Aug 21, 2018
by
pady_1
2
answers
Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group ?
neet
chemistry
past papers
2015
16
asked
Aug 21, 2018
by
pady_1
1
answer
Certain quantity of water cools from $70^°C$ to $60^°C$ in the first 5 minutes and to $54^°C$ in the next 5 minutes. The temperature of the surroundings is;
neet
physics
past papers
2014
16
asked
Aug 20, 2018
by
pady_1
1
answer
A gas is taken through the cycle $A \to B \to C \to A$, as shown. What is the net work done by the gas ? <br>
neet
physics
past papers
2013
16
asked
Aug 20, 2018
by
pady_1
1
answer
When a string is divided into three segments of length $l_1,\; l_2 \;and\; l_3$, the fundamental frequencies of these three segments are $v_1, \;v_2 \;and \;v_3$ respectively. The original functamental frequency (v) of the string is :
neet
physics
past papers
2012
16
asked
Aug 20, 2018
by
pady_1
1
answer
Four electric charge +q, +1, - q and -q are placed at the corners of a square of side 2L. (see figure). The electric potential at point A, midway between the two charge +q and +q, is : <br>
neet
physics
past papers
2011
16
asked
Aug 16, 2018
by
pady_1
1
answer
A thin ring of radius R meter has charge q coulomb uniformly spread on it. The ring rotates about its axis with a constant frequency of f revolutions/s. The value of magnetic induction in $Wb/m^2$ at the centre of the ring is –
neet
physics
past papers
2010
16
asked
Jul 26, 2018
by
pady_1
1
answer
In thermodynamic processes which of the following statements is not true ?
neet
physics
past papers
2009
16
asked
Jul 26, 2018
by
pady_1
1
answer
A thin rod of length L and mass M is bent at it midpoint into two halves so that the angle between them is 90º. The moment of inertia of the bent rod about an axis passing through the bending point and perpendicular to the plane defined by the two halves of the rod is -
neet
physics
past papers
2008
16
asked
Jul 26, 2018
by
pady_1
1
answer
A black body is at $727^{\circ}C$. It emits energy at a rate which is proportional to:
neet
physics
past papers
2007
16
asked
Jul 26, 2018
by
pady_1
1
answer
A particle moves along a straight line OX. At a time t (in seconds) the distance x (in metres) of the particle from O is given by $X=40+12t-t^{3}$. How long would the particle travel before coming to rest: -
neet
physics
past papers
2006
16
asked
Jul 25, 2018
by
pady_1
1
answer
The temperature of inversion of a thermocouple is $620^{\circ}C$ and the neutral temperature is $300^{\circ}C$. What is the temperature of cold junction :
neet
physics
past papers
2005
16
asked
Jul 24, 2018
by
pady_1
1
answer
The peak voltage in the output of a half wave diode rectifier fed with a sinusoidal signal without filter is 10V. The d. c. component of the output voltage is :-
neet
physics
past papers
2004
16
asked
Jul 24, 2018
by
pady_1
1
answer
The time period of a mass suspended from a spring is T. If is the spring is cut into four equal parts and the same mass is suspend from one of the parts, then the new time period will be -
neet
physics
past papers
2003
16
asked
Jul 24, 2018
by
pady_1
1
answer
The Wien's displacement law express relation between : -
neet
physics
past papers
2002
16
asked
Jul 23, 2018
by
pady_1
2
answers
A scientist says that the efficiency of his heat engine which work at source temperature $127^{\circ} C$ and sink temperature $27^{\circ} C$ to $26%$, then
neet
physics
past papers
2001
16
asked
Jul 20, 2018
by
pady_1
1
answer
For a hollow cylinder & a solid cylinder rolling without slipping on an inclined plane, then which of these reaches earlier on the ground :
neet
physics
past papers
2000
16
asked
Jul 20, 2018
by
pady_1
0
answers
Two identical balls A and B are moving with velocity $+0.5\; ms^{–1}$ and $– 0.3\; ms^{–1}$ respectively. They collide head on elastically then their velocities after collision will be :
neet
physics
past papers
1998
16
asked
Jun 15, 2018
by
pady_1
0
answers
While sorting some buttons, Tom put 1 button in the first box, 4 buttons in the second box, 16 buttons in the third box, and 64 buttons in the fourth box. If this pattern continues, how many buttons will Tom put in the fifth box?
class5
math
olympiad
data handling
16
asked
Dec 31, 2015
by
pady_1
0
answers
Alisha is driving down to Shimoga for a vacation, and has already traveled 196.02 kms. If he has traveled \large\frac{33}{50} of the distance, then what is the total distance he drives to get to Shimoga?
class5
math
olympiad
measurements
16
asked
Dec 31, 2015
by
pady_1
0
answers
Find the product: $\large\frac{4}{3} \times \large\frac{7}{9}$
class5
math
olympiad
fractions
decimals
16
asked
Dec 31, 2015
by
pady_1
0
answers
What \% is 900 of 2700?
class5
math
olympiad
computation
16
asked
Dec 31, 2015
by
pady_1
0
answers
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