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Recent questions tagged 38
Questions
Which of the following is incorrect statement ?
neet
chemistry
past papers
2019
38
asked
Jul 8, 2019
by
pady_1
1
answer
In a meter bridge the balancing length from the left end (standard resistance of one ohm is in the right gap) is found to be 20 cm. The value of the unknown resistance is :
jeemain
physics
past papers
1998
38
asked
Dec 19, 2018
by
pady_1
0
answers
A magnetic needle is placed with its north pole facing north in north south direction. In its map of magnetic field the null point will be :
jeemain
physics
past papers
1999
38
asked
Dec 19, 2018
by
pady_1
1
answer
When a uniform wire of radius $r$, is stretched by a $2\;kg$ weight the increase in its length is $2.00\; mm$ If the radius of the wire is $\frac{r}{2}$ and other conditions remining the same, the increase in its length is :
jeemain
physics
past papers
2000
38
asked
Dec 19, 2018
by
pady_1
0
answers
The velocities of three particles of masses $20\; g, \; 30\; g$ and $50\; g$ are $10 \hat{i}, \; 10 \hat{j}$ and $10 \hat{k}$ respectively. The velocity of the centre of mass of the three particles is :
jeemain
physics
past papers
2001
38
asked
Dec 11, 2018
by
pady_1
0
answers
The power factor of an AC circuit having resistance $R$ and inductance $L$ (connected in series) and an angular velocity $\omega$ is :
jeemain
physics
past papers
2002
38
asked
Dec 11, 2018
by
pady_1
0
answers
The length of a simple pendulum executing simple harmonic motion is increase by 21%. The percentage increase in the time period of the pendulum of increased length is :
jeemain
physics
past papers
2003
38
asked
Dec 11, 2018
by
pady_1
0
answers
If sum of all the solutions of the equation $8 \cos x. (\cos (\frac{\pi}{6} + x) . \cos (\frac{\pi}{6} - x) - \frac{1}{2}) = 1$ in $[0, \pi]$ is $k \pi$, then $k$ is equal to :
jeemain
math
past papers
2018
38
asked
Dec 11, 2018
by
pady_1
1
answer
In amplitude modulation, sinusoidal carrier frequency used is denoted by $\omega_c$ and the signal frequency is denoted by $\omega_m$. The bandwidth $(\Delta \omega_m)$ of the signal is such that $\Delta \omega_m<< \omega_c$. Which of the following frequency is not contained in the modulated wave ?
jeemain
physics
past papers
2017
38
asked
Dec 11, 2018
by
pady_1
0
answers
Galvanization is applying a coating of :
jeemain
chemistry
past papers
2016
38
asked
Dec 11, 2018
by
pady_1
0
answers
A variable, opposite external potential $(E_{ext})$ is applied to the cell $Zn|Zn^{2+} \; (1M) || Cu^{2+} \; (1M) | Cu$, of potential $1.1\;V$. When $E_{ext} < 1.1\;V$ and $E_{ext} > 1.1 \;V$, respectively electrons flow from :
jeemain
chemistry
past papers
2015
38
asked
Dec 11, 2018
by
pady_1
0
answers
The statement $\sim (p \leftrightarrow \sim q)$ is
jeemain
math
past papers
2014
38
asked
Dec 11, 2018
by
pady_1
1
answer
The equation of the circle passing through the foci of the ellipse $\frac{x^2}{16} + \frac{y^2}{9} = 1$, and having centre at (0, 3) is
jeemain
math
past papers
2013
38
asked
Dec 11, 2018
by
pady_1
1
answer
The mass of a spaceship is 1000 kg. It is to be launched from the earth's surface out into free space. The value of 'g' and 'R' (radius of earth) are $10\; m/s^2$ and 6400 km respectively. The required energy for this work will be :
jeemain
physics
past papers
2012
38
asked
Dec 11, 2018
by
pady_1
0
answers
Let R be the set of real numbers <br> Statement-1 : $A = \{ (x,y) \in R \times R : y - x$ is an integer $\}$ is an equivalence relation on R. <br> Statement-2 : B = $\{ (x,y) \in R \times R : x = \alpha y$ for some rational number $\alpha \}$ is an equivalence relation on R.
jeemain
math
past papers
2011
38
asked
Dec 11, 2018
by
pady_1
0
answers
In the circuit shown below, the key K is closed at t = 0. The current through the battery is
jeemain
physics
past papers
2010
38
asked
Dec 11, 2018
by
pady_1
0
answers
Which of the following on heating with aqueous KOH, produces acetaldehyde ?
jeemain
chemistry
past papers
2009
38
asked
Nov 29, 2018
by
pady_1
0
answers
The coordination number and the oxidation state of the element ‘E’ in the complex $[E(en)_2(C_2O_4)]NO_2$ (where (en) is ethylene diamine) are, respectively,
jeemain
chemistry
past papers
2008
38
asked
Nov 29, 2018
by
pady_1
0
answers
$\int \frac{dx}{\cos x + \sqrt{3} \sin x}$ equals :
jeemain
math
past papers
2007
38
asked
Nov 29, 2018
by
pady_1
0
answers
In the following, which one of the diodes is reverse biased ?
jeemain
physics
past papers
2006
38
asked
Nov 13, 2018
by
pady_1
0
answers
$\begin{align*}\int \left\{\frac{(\log x -1)}{1 + (\log x)^2}\right\}^2 dx \end{align*}$ is equal to :
jeemain
math
past papers
2005
38
asked
Nov 5, 2018
by
pady_1
0
answers
Two simple harmonic motions are represented by the equations $y_1 = 0.1 \sin (100 \pi t + \frac{\pi}{3} )$ and $y_2 = 0.1 \cos \pi t$. The phase difference of the velocity of particle 1, with respect to the velocity of particle 2 is :
jeemain
physics
past papers
2005
38
asked
Nov 5, 2018
by
pady_1
0
answers
The value of $\begin{align*} \int_{-2}^{3} |1 - x^2| dx \end{align*}$ is
jeemain
math
past papers
2004
38
asked
Nov 5, 2018
by
pady_1
0
answers
Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has cross-sectional area 3A. If the length of the first wire is increased by $\Delta x$ on applying a force F, how much forcce is needed to stretch the second wire by the same amount ?
neet
physics
past papers
2018
38
asked
Aug 21, 2018
by
pady_1
1
answer
$HgCl_2$ and $I_2$ both when dissolved in water containing $I^–$ ions pair of species formed is :
neet
chemistry
past papers
2017
38
asked
Aug 21, 2018
by
pady_1
1
answer
The correct statement regarding RNA and DNA respectively is :
neet
chemistry
past papers
2016
38
asked
Aug 21, 2018
by
pady_1
1
answer
The variation of the boiling points of the hydrogen halides is in the order HF > HI > HBr > HCl. What explains the higher boiling point of hydrogen fluoride ?
neet
chemistry
past papers
2015
38
asked
Aug 21, 2018
by
pady_1
2
answers
The angle of a prism is 'A'. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2A on the first surface returns back through the same path after suffering reflection at the silvered surface. The refractive index $\mu$, of the prism is:
neet
physics
past papers
2014
38
asked
Aug 20, 2018
by
pady_1
1
answer
The wavelength $\lambda_e$ of an electron and $\lambda_p$ of a photon of same energy E are related by -
neet
physics
past papers
2013
38
asked
Aug 20, 2018
by
pady_1
1
answer
When a biconves lens of glass having refractive index 1.47 is dipped in a liqud, it acts as a plane sheet of glass. This implies that the liquid must have refractive index.
neet
physics
past papers
2012
38
asked
Aug 20, 2018
by
pady_1
1
answer
A biconvex lens has a radius of curvature of magnitude 20 cm. Which one of the following options describe best the image formed of an object of height 2 cm placed 30 cm from the lens ?
neet
physics
past papers
2011
38
asked
Aug 16, 2018
by
pady_1
1
answer
In the given circuit the reading of voltmeter $V_1$ and $V_2$ are 300 volts each. The reading of the voltmeter $V_3$ and ammeter A are respectively –
neet
physics
past papers
2010
38
asked
Jul 26, 2018
by
pady_1
1
answer
If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is :
neet
physics
past papers
2009
38
asked
Jul 26, 2018
by
pady_1
2
answers
A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The initial velocity of the shell is
neet
physics
past papers
2008
38
asked
Jul 26, 2018
by
pady_1
1
answer
Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature then it will show :-
neet
physics
past papers
2007
38
asked
Jul 26, 2018
by
pady_1
1
answer
A transverse wave propagating along x-axis is represented by $Y(x,t)=8.0 \sin (0.5 \pi x-4\pi-\frac {\pi }{4})$ where x is in metres and t is in seconds. The speed of the wave is:-
neet
physics
past papers
2006
38
asked
Jul 25, 2018
by
pady_1
1
answer
Carbon, Silicon and Germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by $(E_g){_c}$ $(E_g)_Si$and $(E_g)_Ge$ respectively. Which one of the following relationships is true in their case .
neet
physics
past papers
2005
38
asked
Jul 24, 2018
by
pady_1
1
answer
Consider a system of two particles having masses $m_1$ and $m_2$ . If the particle of mass $m_1$ is pushed towards the mass centre of particles through a distance 'd', by what distance would the particle of mass $m_2$ move so as to keep the mass centre of particles at the original position
neet
physics
past papers
2004
38
asked
Jul 24, 2018
by
pady_1
1
answer
In which of the following systems will be radius of the first orbit (n = 1) be minimum -
neet
physics
past papers
2003
38
asked
Jul 24, 2018
by
pady_1
2
answers
For a series LCR circuit the power loss at resonance is : -
neet
physics
past papers
2002
38
asked
Jul 23, 2018
by
pady_1
2
answers
If number of turn, area and current through it is given by n, A and i respectively then its magnetic moment will be :-
neet
physics
past papers
2001
38
asked
Jul 20, 2018
by
pady_1
1
answer
Who evaluated the mass of electron indirectly with help of charge :
neet
physics
past papers
2000
38
asked
Jul 20, 2018
by
pady_1
1
answer
A charge q is placed in an uniform electric field E. If it is released, then the K.E of the charge after travelling distance y will be :
neet
physics
past papers
1998
38
asked
Jun 15, 2018
by
pady_1
1
answer
The shopping mall is shorter than the grocery store but taller than the library. Which building is the tallest?
class5
math
olympiad
logical
analytical
reasoning
38
asked
Dec 31, 2015
by
pady_1
1
answer
The instrument to measure an angle is a
class5
math
olympiad
data handling
38
asked
Dec 31, 2015
by
pady_1
0
answers
Ridhima drove 90.6264 kms to visit her grandmother. When she reached her grandmother's house she noticed the car had used up 4.92 litres of petrol. How many kilometers did she travel per litre of petrol?
class5
math
olympiad
measurements
38
asked
Dec 31, 2015
by
pady_1
2
answers
$4 \div \large\frac{1}{3}$
class5
math
olympiad
fractions
decimals
38
asked
Dec 31, 2015
by
pady_1
0
answers
In an examination of 75 marks, Richard got 60\% marks. How many marks did Richard get?
class5
math
olympiad
computation
38
asked
Dec 31, 2015
by
pady_1
0
answers
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