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Recent questions tagged 50
Questions
A block of mass 10 kg is in contact against the inner wall of a hollow cylindrical drum of radius 1 m. The coefficient of friction between the block and the inner wall of the cylinder is 0.1. The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is vertical and rotating about its axis, will be :$(g = 10\frac{m}{s^2})$
neet
physics
past papers
2019
50
asked
Jul 8, 2019
by
pady_1
1
answer
The potential in the depletion layer is due to :
jeemain
physics
past papers
1998
50
asked
Dec 19, 2018
by
pady_1
0
answers
A varying current in a coil changes from 10 A to zero in 0.5 s. If the average emf induced in the coil is 2 volts, the self inductance of the coil is :
jeemain
physics
past papers
1999
50
asked
Dec 19, 2018
by
pady_1
0
answers
The focal length of the lenses of an astronomical telescope are 50 cm and 5 cm. The length of the telescope when the image is formed at the least distance of distinct vision is :
jeemain
physics
past papers
2000
50
asked
Dec 19, 2018
by
pady_1
0
answers
A steel meter scale is to be ruled so hat millimeter intervals are accurate within about $5 \times 10^{-5}m$ at a certain temperature. The maximum temperature variation allowable during the ruling is: <br> (Coefficient of linear expansion of steel = $10 \times 10^{-6} K^{-1}$)
jeemain
physics
past papers
2001
50
asked
Dec 11, 2018
by
pady_1
1
answer
A spring of force constant 800 N/m has an extension of 5 cm. The work done in extending it from 5 cm to 15 cm is :
jeemain
physics
past papers
2002
50
asked
Dec 11, 2018
by
pady_1
0
answers
The displacement of a particle varies according to the relation $x=4 (\cos \pi t + \sin \pi t)$. The amplitude of the particle is :
jeemain
physics
past papers
2003
50
asked
Dec 11, 2018
by
pady_1
0
answers
For each $t \in R$ let $[t]$ be the greatest integer less than or equal to $t$. Then <br> $ \displaystyle\lim_{x \to 0^-} x$ $\begin{pmatrix} [\frac{1}{x} +[\frac{2}{x}] +....+[\frac{15}{x}] \end{pmatrix}$
jeemain
math
past papers
2018
50
asked
Dec 11, 2018
by
pady_1
1
answer
In the given circuit diagram when the current reaches steady state in the circuit, the charge on the capacitor of capacitance C will be : <br>
jeemain
physics
past papers
2017
50
asked
Dec 11, 2018
by
pady_1
0
answers
The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration of :
jeemain
chemistry
past papers
2016
50
asked
Dec 11, 2018
by
pady_1
1
answer
Photochemical smog consists of excessive amount of X, in addition to aldehydes, ketones, peroxy acetyl nitrile (PAN), and so forth. X is :
jeemain
chemistry
past papers
2015
50
asked
Dec 11, 2018
by
pady_1
0
answers
The area of the region described by $A = \{(x, y) : x^2 + y^2 \leq 1$ and $y^2 \leq 1 - x\}$ is
jeemain
math
past papers
2014
50
asked
Dec 11, 2018
by
pady_1
1
answer
If $P = \begin{bmatrix} 1 & \alpha & 3 \\ 1 & 3 & 3 \\ 2 & 4 & 4 \end{bmatrix}$ is the adjoint of a $3 \times 3$ matrix A and $|A| = 4$, then $\alpha$ is equal to
jeemain
math
past papers
2013
50
asked
Dec 11, 2018
by
pady_1
1
answer
A radar has a power of 1 Kw and is operating at a frequency of 10 GHz. It is located on a mountain top of height 500 m. The maximum distance upto which it can detect object located on the surface of the earth (Radius of earth = $6.4 \times 10^{6} m$ ) is
jeemain
physics
past papers
2012
50
asked
Dec 11, 2018
by
pady_1
0
answers
If C and D are two events such that $C \subset D$ and $P(D) \neq 0$, then the correct statement among the following is
jeemain
math
past papers
2011
50
asked
Dec 11, 2018
by
pady_1
0
answers
The potential energy function for the force between two atoms in a diatomic molecule is approximately given by $U(x) = \frac{a}{x^{12}} - \frac{b}{x^6}$, where $a$ and $b$ are constants and $x$ is the distance between the atoms. If the dissociation energy of the molecule is $D = [U_{(x = \infty)} - U_{at\; equilibrium}], \; D$ is
jeemain
physics
past papers
2010
50
asked
Dec 11, 2018
by
pady_1
1
answer
In context with the transition elements, which of the following statements is incorrect ?
jeemain
chemistry
past papers
2009
50
asked
Nov 29, 2018
by
pady_1
0
answers
For the following three reactions a, b and c, equilibrium constants are given <br> a. $CO(g)+ H_2O(g) =CO_2 (g) + H_2 (g); K_1$ <br> b . $CH_4 (g) + H_2O(g) =CO(g) + 3H_2 (g); K_2$ <br> c. $CH_4 (g) + 2H_2O(g) = CO_2 (g) + 4H_2(g); K_3$ <br> Which of the following relations is correct?
jeemain
chemistry
past papers
2008
50
asked
Nov 29, 2018
by
pady_1
0
answers
If in a $p-n$ junction diode, a square input signal of 10 V is applied as shown : <br> <br> Then the output signal across $R_L$ will be :
jeemain
physics
past papers
2007
50
asked
Nov 29, 2018
by
pady_1
0
answers
Two spherical conductors A and B of radii 1 mm and 2 mm are separated by distance of 5 cm and are uniformly charged. If the spheres are connected by a conducting wire then in equilibrium conditon, the ratio of the magnitude of the electric fields at the surfaces of spheres A and B is :
jeemain
physics
past papers
2006
50
asked
Nov 13, 2018
by
pady_1
0
answers
A circle touches the $x-axis$ and also touches the circle with centre at (0, 3) and radius 2. The locus of the centre of the circle is :
jeemain
math
past papers
2005
50
asked
Nov 5, 2018
by
pady_1
0
answers
Two sources of equal emf are connected to an external resistance $R$. The internal resistances of the two sources are $R_1$ and $R_2 (R_2 > R_1)$. If the potential difference across the source having internal resistance $R_2$, is zero, then :
jeemain
physics
past papers
2005
50
asked
Nov 5, 2018
by
pady_1
0
answers
A variable circle passes through the fixed point $A(p, q)$ and touches x-axis. The locus of the other end of the diameter through A is
jeemain
math
past papers
2004
50
asked
Nov 5, 2018
by
pady_1
0
answers
Nitrogen of aniline in strong acidic medium also gives m-nitroaniline because
neet
chemistry
past papers
2018
50
asked
Aug 21, 2018
by
pady_1
1
answer
A gene whose expression helps to identify transformed cell is known as
neet
zoology
past papers
2017
50
asked
Aug 21, 2018
by
pady_1
1
answer
The Avena curvature is used for bioassay of
neet
botany
past papers
2016
50
asked
Aug 21, 2018
by
pady_1
1
answer
Most animals that live in deep oceanic waters are -
neet
botany
past papers
2015
50
asked
Aug 21, 2018
by
pady_1
1
answer
Which property of colloids is not dependent on the charge on colloidal particles?
neet
chemistry
past papers
2014
50
asked
Aug 20, 2018
by
pady_1
1
answer
A reaction having equal energies of activation for forward and reverse reactions has -
neet
chemistry
past papers
2013
50
asked
Aug 20, 2018
by
pady_1
2
answers
Transfer characteristics [output voltage $(V_0)$ vs input voltage $(V_i)$] for a base biased transistor in CE configuration is as show in the figure. For using transistor as a switch, it is used. <br>
neet
physics
past papers
2012
50
asked
Aug 20, 2018
by
pady_1
1
answer
Symbolic representation of four logic gates are shown as : <br> <br> Pick out which ones are for AND, NAND and NOT gates, respectively :
neet
physics
past papers
2011
50
asked
Aug 16, 2018
by
pady_1
1
answer
To get an output Y = 1 from the circuit shown below, the input must be â€“
neet
physics
past papers
2010
50
asked
Jul 26, 2018
by
pady_1
1
answer
A transistor is operated in common-emitter configuration at $V_c=2V$ such that a change in the base current from 100 µA to 200 µA produces a change in the collector current from 5 mA to 10 mA. The current gain is :
neet
physics
past papers
2009
50
asked
Jul 26, 2018
by
pady_1
2
answers
A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively with and without being short circuited through a resistance of $10 \Omega$. Its internal resistance is -
neet
physics
past papers
2008
50
asked
Jul 26, 2018
by
pady_1
1
answer
For a cubic crystal structure which one of the following relations indicting the cell characteristic is correct :-
neet
chemistry
past papers
2007
50
asked
Jul 26, 2018
by
pady_1
2
answers
Two bodies, A(of mass 1kg) and B(of mass 3kg), are dropped from heights of 16 m and 25 m respectively. The ratio of the time taken by them to reach the ground is:-
neet
chemistry
past papers
2006
50
asked
Jul 25, 2018
by
pady_1
1
answer
A ball is thrown vertically up ward. It has a speed of 10m/sec when it has reached one half of its maximum height. How high does the ball rise? Take g = $10=m/s^2-$
neet
physics
past papers
2005
50
asked
Jul 24, 2018
by
pady_1
2
answers
A 6 volt battery is connected to the terminals of a three metre long wire of uniform thickness e and resistance of 100 ohm. The difference of potential between two points on the wire separated by a distance of 50 cm will be :-
neet
physics
past papers
2004
50
asked
Jul 24, 2018
by
pady_1
1
answer
Following diagram performs the logic function of :
neet
physics
past papers
2003
50
asked
Jul 24, 2018
by
pady_1
1
answer
A deuteron is bombarded on $_{8}O^{16}$ nucleus then $\alpha$-particle is emitted then product nucleus is -
neet
physics
past papers
2002
50
asked
Jul 23, 2018
by
pady_1
2
answers
Energy is released in nuclear fission is due to
neet
chemistry
past papers
2001
50
asked
Jul 20, 2018
by
pady_1
1
answer
Which pair have not equal dimensions :
neet
physics
past papers
2000
50
asked
Jul 20, 2018
by
pady_1
1
answer
A particle, with restoring force proportional to displacement and resisting force proportional to velocity is subjected to a force F sin $\omega$t. If the amplitude of the particle is maximum for $\omega$ = $\omega_{1}$ and the energy of the particle maximum for $\omega$ = $\omega_{2}$, then :
neet
physics
past papers
1998
50
asked
Jun 15, 2018
by
pady_1
1
answer
A truck departs from a distribution centre. From there, it goes 2 kilometres north, 7 kilometres south, 2 kilometres east, and 5 kilometres north. How many kilometres is the truck from the distribution centre?
class5
math
olympiad
logical
analytical
reasoning
50
asked
Dec 31, 2015
by
pady_1
1
answer
7 of the people in Gabe's flat building like beetles. 6 people like spiders, and 5 people like both beetles and spiders. How many people like beetles or spiders or both?
class5
math
olympiad
data handling
50
asked
Dec 31, 2015
by
pady_1
0
answers
A snail crawls 30 cm in 20 minutes. It crawls another 49 cm in 32 minutes. How many metres does it travel in the total time?
class5
math
olympiad
measurements
50
asked
Dec 31, 2015
by
pady_1
0
answers
There are 31 students in class 5. There are 12 boys in the class. What is the fraction of girls in the class ?
class5
math
olympiad
fractions
decimals
50
asked
Dec 31, 2015
by
pady_1
0
answers
So far, an orchard has sold a total of 15,034 kilograms of fresh fruit and 35,730 kilograms of frozen fruit this season. In total, how many kilograms of fruit have been sold?
class5
math
olympiad
computation
50
asked
Dec 31, 2015
by
pady_1
0
answers
The variance of first 50 even natural numbers is :
the
variance
of
first
50
even
natural
numbers
is
asked
Mar 31, 2015
by
priyal_dps
1
answer
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