Email
Chat with tutors
Login
Ask Questions, Get Answers
Menu
X
home
ask
tuition
questions
practice
papers
mobile
tutors
pricing
X
Recent questions tagged 7
Questions
Among the following, the one that is not a green house gas is :-
neet
chemistry
past papers
2019
7
asked
Jul 8, 2019
by
pady_1
1
answer
A car starts from rest, attains a velocity of $36 \; km/h$ with an acceleration of $0.2 \;m/s^2$, travels $9 \; km$ with this uniform velocity and then comes to halt with a uniform deaceleration of $0.1\; m/s^2$. The total time of travel of the car is :
jeemain
physics
past papers
1998
7
asked
Dec 19, 2018
by
pady_1
0
answers
A car starts from rest and travels with uniform acceleration $\alpha$, for some time and then with uniform retardation $\beta$ and comes to rest. If the total travel time of car is $t$, the maximum velocity attained by it is given by :
jeemain
physics
past papers
1999
7
asked
Dec 19, 2018
by
pady_1
0
answers
A short bar magnet with its north pole facing north forms a neutral point at $P$ in the horizontal plane. If the magnet is rotated by $90^{\circ}$ is the horizontal plane, the net magnetic induction at $P$ is : (Horizontal component of earth's magnetic field = $B_H$ )
jeemain
physics
past papers
2000
7
asked
Dec 19, 2018
by
pady_1
0
answers
A magnet freely suspended in a vibration magnetometer makes $40$ oscillations per minute at place 'A' and $20$ oscillations per minute at a place 'B'. If the horizontal component of earth's maagnetic field at 'A' is $36 \times 10^{-6}T$, then its value at 'B' is :
jeemain
physics
past papers
2001
7
asked
Dec 11, 2018
by
pady_1
0
answers
If in a circular coil $A$ of radius $R$, current $i$ is flowing and in another coil $B$ of radius $2R$ a current $2i$ is flowing, then the ratio of the magnetic fields, $B_A$ and $B_B$ produced by them will be :
jeemain
physics
past papers
2002
7
asked
Dec 11, 2018
by
pady_1
0
answers
A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of 5 m/s, the reading of the spring balance will be :
jeemain
physics
past papers
2003
7
asked
Dec 11, 2018
by
pady_1
0
answers
If the series limit frequency of the Lyman series is $v_{_L}$, then the series limit frequency of the Pfund series is :
jeemain
physics
past papers
2018
7
asked
Dec 11, 2018
by
pady_1
0
answers
Twenty meters of wires is available for fencing off a flower-bed in the form of a circular sector. Then the maximum area (in sq. m) of the flower-bed, is :
jeemain
math
past papers
2017
7
asked
Dec 11, 2018
by
pady_1
1
answer
A pendulum clock loses 12 s a day if the temperature is $40^oC$ and gains 4 s a day if the temperature is $20^oC$. The temperature at which the clock will show correct time, and the co-efficient of linear expansion ($\alpha$) of the metal of the pendulum shaft are respectively :
jeemain
physics
past papers
2016
7
asked
Dec 11, 2018
by
pady_1
0
answers
A very long (length L) cylindrical galaxy is made of uniformly distributed mass and has radius $R(R << L)$. A star outside the galaxy is orbiting the galaxy in a plane perpendicular to the galaxy and passing through its centre. If the time period of star is T, and its distance from the galaxy's axis is $r$, then :
jeemain
physics
past papers
2015
7
asked
Dec 11, 2018
by
pady_1
0
answers
A parallel plate capacitor is made of two circular plates separated by a distance of 5 mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is $3 \times 10^4 V/m$, the charge density of the positive plate will be close to :
jeemain
physics
past papers
2014
7
asked
Dec 11, 2018
by
pady_1
0
answers
A solution of $(-) -1 - chloro - 1 - phenylethane$ is toluene racemises slowly in the presence of a small amount of $SbCl_5$, due to the formation of :
jeemain
chemistry
past papers
2013
7
asked
Dec 11, 2018
by
pady_1
0
answers
Statement 1 : An equation of a common tangent to the parabola $y^2 = 16 \sqrt{3}x$ and the ellipse $2x^2 + y^2 = 4$ is $y = 2x + 2\sqrt{3}$. <br> Statement 2 : If the line $y = mx + \frac{4 \sqrt{3}}{m}, (m \neq 0)$ is a common tangent to the parabola $y^2 = 16 \sqrt{3}x $ and the ellipse $2x^2 + y^2 = 4$, then $m$ satisfies $m^2 + 2m^2 = 24$.
jeemain
math
past papers
2012
7
asked
Dec 11, 2018
by
pady_1
1
answer
Two bodies of masses m and 4m are placed at a distance r. The gravitational potential at a point on the line joining them where the gravitational field is zero is :
jeemain
physics
past papers
2011
7
asked
Dec 11, 2018
by
pady_1
0
answers
If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water ($\Delta T_f$), when 0.01 mol of sodium sulphate is dissolved in 1 kg of water, is $(K_f = 1.86\; K\; kg\; mol^{–1})$
jeemain
chemistry
past papers
2010
7
asked
Dec 11, 2018
by
pady_1
0
answers
A thin uniform rod of length $\ell$ and mass $m$ is swinging freely about a horizontal axis passing through its end. Its maximum angular speed is $\omega$. Its centre of mass rises to a maximum height of
jeemain
physics
past papers
2009
7
asked
Nov 29, 2018
by
pady_1
0
answers
Let $f : N\rightarrow Y$ be a function defined as $f (x) = 4x + 3$, where $Y = {y\; \epsilon \;N : y = 4x + 3 for \;some\; x \;\epsilon\; N}$. Show that f is invertible and its inverse is
jeemain
math
past papers
2008
7
asked
Nov 29, 2018
by
pady_1
0
answers
A pair of fair dice is thrown independently three times. The probabiliy of getting a score of exactly 9 twice is :
jeemain
math
past papers
2007
7
asked
Nov 29, 2018
by
pady_1
0
answers
A bomb of mass 16 kg at rest explodes into two pieces of masses $4\; kg$ and $12\; kg$. The velocity of the $12\; kg$ mass id $4\; m^{-1}$. The kinetic energy of the other mass is :
jeemain
physics
past papers
2006
7
asked
Nov 13, 2018
by
pady_1
0
answers
$ \displaystyle{\lim_{x \to \infty} [\frac{1}{n^2} \sec^2 \frac{1}{n^2} + \frac{2}{n^2} \sec^2 \frac{4}{n^2} + . . . . . . + \frac{n}{n^2} \sec^2 1]}$
jeemain
math
past papers
2005
7
asked
Nov 5, 2018
by
pady_1
0
answers
The relation between time $t$ and distance $x$ is $t=ax^2+bx$, where $a$ and $b$ are constants. The acceleration is :
jeemain
physics
past papers
2005
7
asked
Nov 5, 2018
by
pady_1
0
answers
Let $A =\begin{pmatrix} 1 & -1 & 1 \\ 2 & 1 & -3 \\ 1 & 1 & 1 \end{pmatrix} \; (10) B = \begin{pmatrix} 4 &2 &2 \\ -5 & 0 & \alpha \\ 1 & -2 & 3 \end{pmatrix} $. If $B$ is the inverse of matrix $A$, then $\alpha$ is
jeemain
math
past papers
2004
7
asked
Nov 5, 2018
by
pady_1
0
answers
A set of 'n' equal resistors, of value 'R' each, are connected in series to a battery of emf 'E' and internal resistance 'R'. The current drawn is I. Now, the 'n' resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10 I. The value of 'n' is :
neet
physics
past papers
2018
7
asked
Aug 21, 2018
by
pady_1
1
answer
Name the gas that can readily decolourise acidified $KMnO_4$ solution :
neet
chemistry
past papers
2017
7
asked
Aug 21, 2018
by
pady_1
1
answer
The reaction <br> <br> can be classified as :
neet
chemistry
past papers
2016
7
asked
Aug 21, 2018
by
pady_1
1
answer
Aqueous solution of which of the following compounds is the best conductor of electric current ?
neet
chemistry
past papers
2015
7
asked
Aug 21, 2018
by
pady_1
1
answer
A body of mass (4m) is lying in x-y plane at rest. It suddenly explodes into three pieces. Two pieces each of mass (m) move perpendiculr to each other with equal speeds $(v)$. The total kinetic energy generated due to explosion is :
neet
physics
past papers
2014
7
asked
Aug 20, 2018
by
pady_1
1
answer
An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass 1 kg moves with a speed of $12 ms^{–1}$ and the second part of mass 2 kg moves with $8 ms^{–1}$ speed. If the third part files off with $4 ms^{–1}$ speed, then its mass is -
neet
physics
past papers
2013
7
asked
Aug 20, 2018
by
pady_1
1
answer
The potential energy of a particle in a force field is :$U=\frac{A}{r^2}-\frac{B}{r}$ where A and B are positive constants and r is the distance of particle from the centre of the field. For stable equilibrium, the distance of the particle is
neet
physics
past papers
2012
7
asked
Aug 20, 2018
by
pady_1
1
answer
A particle moves in a circle of radius 5 cm with constant speed and time period $0.2 \pi s$. The acceleration of the particle is :
neet
physics
past papers
2011
7
asked
Aug 16, 2018
by
pady_1
1
answer
A beam of cathode rays is subjected to crossed. Electric (E) and Magnetic fields (B). The fields are adjusted such that the beam is not deflected. The specific charge of the cathode rays is given by – <br> (where V is the potential difference between cathode and anode)
neet
physics
past papers
2010
7
asked
Jul 26, 2018
by
pady_1
1
answer
Two bodies of mass 1 kg and 3 kg have position vectors$\widehat{i}+2\widehat{j}+\widehat{k}$ and $-3\widehat{i}-2\widehat{j}+\widehat{k}$ , respectively. The centre of mass of this system has a position vector :
neet
physics
past papers
2009
7
asked
Jul 26, 2018
by
pady_1
1
answer
A thin conducting ring of radius R is given a charge + Q. The electric field at the centre O of the ring due to the charge on the part AKB of the ring is E. The electric field at the centre due to the charge on the part ACDB of the ring is -
neet
physics
past papers
2008
7
asked
Jul 26, 2018
by
pady_1
1
answer
A wheel as angular acceleration of $3.0 rad/sec^2$ and initial angular speed of $2.00 rad/sec$. In a time of $2 sec$ it has rotated through an angle (in radian) of :
neet
physics
past papers
2007
7
asked
Jul 26, 2018
by
pady_1
1
answer
A black body at 1227ºC emits radiations with maximum intensity at a wavelength of 5000Å. The temperature of the body is increased by 1000ºC, the maximum intensity will be observe at:-
neet
physics
past papers
2006
7
asked
Jul 25, 2018
by
pady_1
1
answer
Two charges $q_1$ and $q_2$ are placed 30 cm apart, as shown in the figure. A third charge $q_3$ is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy of the system is $\frac{q_3}{4\pi \epsilon_0}k$ , where k is –
neet
physics
past papers
2005
7
asked
Jul 24, 2018
by
pady_1
1
answer
Two springs of spring constants $k_1$ and$ k_2$ are joined in series. The effective spring constant of the combination is given by -
neet
physics
past papers
2004
7
asked
Jul 24, 2018
by
pady_1
1
answer
The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a height of 2m on the surface of A. What is the height of jump by the same person on the planet B.
neet
physics
past papers
2003
7
asked
Jul 24, 2018
by
pady_1
1
answer
A disc is rotating with angular speed $\omega$. If a child sits on it, what is conserved : -
neet
physics
past papers
2002
7
asked
Jul 23, 2018
by
pady_1
1
answer
A black body has wavelength $\lambda_m$ corresponding to maximum energy at 2000 K. Its wavelength corresponding to maximum energy at 3000 K will be : -
neet
physics
past papers
2001
7
asked
Jul 20, 2018
by
pady_1
1
answer
A mass is performing vertical circular motion (see figure).If The average velocity of the particle is increased, then at which point the string will break :
neet
physics
past papers
2000
7
asked
Jul 20, 2018
by
pady_1
1
answer
For protecting a magnetic needle it should be placed :
neet
physics
past papers
1998
7
asked
Jun 15, 2018
by
pady_1
2
answers
If A × 3 = B B - A = 20, then what is the value of B + A ?
class5
math
olympiad
logical
analytical
reasoning
7
asked
Dec 31, 2015
by
pady_1
1
answer
Complete the Numerical Series: 1, 8, 24, 29, 87, 92, __, __, __
class5
math
olympiad
data handling
7
asked
Dec 31, 2015
by
pady_1
0
answers
Find the cost of painting a wall of length 80 m and breadth 15 m at the rate of $ 4 per sq. m.
class5
math
olympiad
measurements
7
asked
Dec 31, 2015
by
pady_1
2
answers
$\large\frac{4}{7} \div 9$
class5
math
olympiad
fractions
decimals
7
asked
Dec 31, 2015
by
pady_1
0
answers
Sara got 150 questions as assignment for a week. If she did 70% of the questions in the first four days, how many questions would she have to do in the remaining days?
class5
math
olympiad
computation
7
asked
Dec 31, 2015
by
pady_1
0
answers
To see more, click for the
full list of questions
or
popular tags
.
Home
Ask
Tuition
Questions
Practice
Your payment for
is successful.
Continue
...