Recent questions tagged q98

The magnetic field density applied in a cyclotron is $3.5 \;T$ what will be the frequency of electric field that must be applied between the dees in order to accelerate protons. Mass of protons $= 1.67 \times 10^{27}\;kg$

asked Aug 5, 2015 by meena.p

1 answer

The susceptibility of magnetism at book is $ 1.2 \times 10^{-5}$ At what temperature will the susceptibility be equal to $1.44 \times 10^5?$

asked Jul 22, 2015 by meena.p

1 answer

The number of electric lines of force radiating from a closed surface vaccum is $1.13 \times 10^{11}$ . The change enclosed by the surface is

asked Jul 8, 2015 by meena.p

1 answer

An immersion heater is rated $836 walt$ In what time it should heat litre of water from $20^{\circ}$ to $40^{\circ}? J= 4.18 \;J/cal $

asked Jul 3, 2015 by meena.p

1 answer

Cellulose upon acetylation with excess acetic anhydride/ $H_2SO_4$ (catalytic) gives cellulose triacetate whose structure is

asked Mar 31, 2014 by thanvigandhi_1

1 answer

The salt which is likely to be found in plant is

asked Mar 20, 2014 by meena.p

1 answer

Highest molar conductivity is exhibited by

asked Mar 13, 2014 by meena.p

1 answer

The monomer unit of PAN is

asked Mar 12, 2014 by thanvigandhi_1

1 answer

Among the following species,identify the isostructural pairs: $NF_3,NO_3^-,BF_3,H_3O^+,HN_3$

asked Mar 7, 2014 by sreemathi.v

1 answer

A sinusoidal electromagnetic plane wave travels through the empty space in $x$ - direction. The electric wave is polarized in the $y$ - direction frequency of waves is $1.5\: GHz$. At a certain point $P$ in space, the oscillating $E_y$ attains a maximum magnitude $E_o = 6.3 \: mV/m$ \[\] The maximum magnitude $B_o$ of the magnetic field at the point is

asked Mar 5, 2014 by thanvigandhi_1

1 answer

The major product obtained on heating $\gamma$-hydroxy acid $CH_3-CH_2-CHOH-CH_2-CH_2-COOH$ is

asked Feb 26, 2014 by sreemathi.v

1 answer

Which one of the following aqueous solutions has the lowest vapour pressure?

asked Feb 17, 2014 by sreemathi.v

1 answer

Time constant of a $RC$ circuit is $2/ln(2) s$. Capacitor is discharged at time $ t = 0$. The ratio of charge on the capacitor at time $t = 2s$ and $t = 6s$ is

asked Feb 13, 2014 by thanvigandhi_1

1 answer

$\large\frac{dy}{dx}$$=1$ passes through $\large[$$0,\large\frac{3}{2}]$ and $ \large\frac{dy}{dx}$$=2$ passes through $[0,1]$ represents two curve which passes through a point whose coordinates are zeroes of a quadratic polynomial . The quadratic equation is gradient polynomial. Find sum of coefficients of $x^3,x^2,x$

asked Feb 7, 2014 by meena.p

1 answer

What should be the value of eccentricity for a hyperbola?

asked Feb 7, 2014 by sreemathi.v

1 answer

When forward bias is applied to a p-n junction.

asked Jan 31, 2014 by meena.p

1 answer

Metals used in flash photography is

asked Jan 29, 2014 by sreemathi.v

1 answer

$2Na+2D_2O\rightarrow x+D_2$.The $x$ is

asked Jan 27, 2014 by sreemathi.v

1 answer

$Cl+O_3\rightarrow x+O_2,ClO+O\rightarrow y+O_2$.Net reaction :$O_3+O\quad\underrightarrow {Cl}\quad z$.The $y$ is

asked Jan 22, 2014 by sreemathi.v

1 answer

If $(1+3+5+....+p)$+$(1+3+5+....+q)$ = the smallest value of $p+q+r, (p>6)$ is

asked Jan 20, 2014 by yamini.v

1 answer

Calculate $\lambda$ of the radiations when the electrons jumps from III to II orbit for H atom.The electronic energy in II and III Bohr's orbit of H atom are $-5.42\times 10^{-12}$ and $-2.41\times 10^{-12}$erg respectively.

asked Jan 15, 2014 by sreemathi.v

1 answer

If $A(4,7,8),\:B(2,3,4),\:C(2,5,7)$ are vertices of a triangle then the length of internal bisector of angle $A$ is ?

asked Jan 12, 2014 by rvidyagovindarajan_1

1 answer

$\lim\limits_{x\to 0}\bigg[\large\frac{1+5x^2}{1+3x^2}\bigg]^{\Large\frac{1}{x^2}}$

asked Dec 30, 2013 by sreemathi.v

1 answer

Integrate: $ \int \sqrt {x^2+4x+4}.dx$

asked Dec 19, 2013 by meena.p

1 answer

In a reaction of aniline a coloured product C was obtained

asked Dec 18, 2013 by thanvigandhi_1

0 answers

The aquatic organism with a prehensile tail is :

asked Dec 11, 2013 by thanvigandhi_1

0 answers

If $\overrightarrow a=\hat i+\hat j+p\hat k\:\:and\:\:\overrightarrow b=\hat i+\hat j+\hat k$, then $|\overrightarrow a+\overrightarrow b|=|\overrightarrow a|+|\overrightarrow b|$ holds for ?

asked Dec 10, 2013 by rvidyagovindarajan_1

1 answer

Tandoba National Park is in

asked Dec 5, 2013 by thanvigandhi_1

0 answers

The solubility of $A_2X_3$ is y mol $dm^{-3}$. Its solubility product is

asked Nov 27, 2013 by mosymeow_1

1 answer

Identify a deuterostome

asked Nov 27, 2013 by thanvigandhi_1

0 answers

One mole of an ideal gas ( y = 1.4 ) is adiabatically compressed so that its temperature rises from $ 27^{\circ} C \: to \: 35^{\circ}C$. The change in the internal energy of the gas is $(R=8.3\: J \: mol^{-1}K^{-1}$) :

asked Nov 17, 2013 by thanvigandhi_1

1 answer

In a $\Delta ABC$ if $b=2,B=30^{\large\circ}$ then the area of the circumcircle of $\Delta$ ABC in square unit is

asked Nov 15, 2013 by sreemathi.v

1 answer

Two circular rings of equal mass (m) and radius (r) are placed side by side, touching each other. The moment of inertia of the system about tangential axis in the plane of system passing through point of contact of the rings is :

asked Nov 2, 2013 by thanvigandhi_1

1 answer

To 50litre of 0.2N NaOH ,5litre of 1N HCl and 15litre of 0.1N $FeCl_3$ solution are added .What weight of $Fe_2O_3$ can be obtained from the precipitate?Also report the normality of NaOH left in the resultant solution.

asked Oct 31, 2013 by sreemathi.v

1 answer

Two capillary tubes A and B are arranged in parallel. A liquid flows through these capillary tubes under the same pressure head. Both the tubes have a same length. The radii of A and B are r and $\large\frac{r}{2}$ respectively. If the rate of flow of liquid through A is $8\: cm^3/s$ , then the rate of flow through the combination of A and B is

asked Oct 19, 2013 by thanvigandhi_1

2 answers

In the adiabatic compression, the decrease in volume is associated with

asked Oct 18, 2013 by meena.p

1 answer

Two sources A and B are sending notes of frequency $680\;Hz.$ A listener moves from A to B with a constant velocity 'u'. If the speed of sound in air is $340 ms^{-1}$, What must be the value of $'u'$ so that he hears 10 beats per second?

asked Oct 11, 2013 by meena.p

1 answer

A 3 kg block is placed over a 10 kg block and both are placed on a smooth horizontal surface. The coefficient of friction between the blocks is 0.2 . If a horizontal force of 20 N is applied to 3 kg block, accelerations of the two blocks in $ ms^{-2}$ are $(g=10\: ms^{-2})$

asked Oct 9, 2013 by thanvigandhi_1

1 answer

An ideal gas expands isothermally from volume $V_1$ to volume $V_2$. It is then compressed to the original volume $V_1$ adiabatically.If $P_1,P_2$ and W represent the initial pressure, final pressure and the net work done by the gas respectively during the entire process, then:

asked Sep 30, 2013 by meena.p

1 answer

If two soap bubbles of different radii are connected by a tube, then :

asked Sep 24, 2013 by meena.p

1 answer

Three moles of an ideal monoatomic gas undergoes a cyclic process as shown in the figure. The temperature of the gas in different states marked as 1,2,3 and 4 are 400 K, 700 K, 2500 K and 1100 K respectively. The work done by the gas during the process $1 -2 -3 -4 -1$ is (Universal gas constant R)

asked Sep 17, 2013 by meena.p

0 answers

If G is the universal gravitational constant and $\rho$ is the uniform density of a spherical planet. Then the shortest possible period of rotation of the planet can be

asked Aug 30, 2013 by meena.p

1 answer

Two balls at same temperature collide inelastically which of the following are not conserved 1) Kinetic energy 2) Velocity 3) temperature 4) momentum

asked Aug 9, 2013 by meena.p

1 answer

A body is placed on rough inclined plane of inclination $\theta$. As angle $\theta$ is increased from $0^{\circ}$ to $ 90^{\circ}$ the contact force between the block and plane

asked Jul 15, 2013 by meena.p

1 answer

The differential equation formed by eliminating $A$ and $B$ from the relation $y=e^{x}(A\cos x+ B\sin x) $ is

asked May 23, 2013 by poojasapani_1

1 answer

The distance between the foci of the ellipse $9x^{2}+5y^{2}=180 $ is

asked May 13, 2013 by poojasapani_1

1 answer

Evaluate:\[\int\limits_0^1 \sqrt{\frac{1-x}{1+x}}dx\]

asked Feb 4, 2013 by meena.p

1 answer

A poster is to contain $50cm^2$ of matter with borders of 4 cm at top and bottom and of 2 cm on each side. Find the dimensions if the total area of the poster is minimum.

asked Jan 30, 2013 by meena.p

1 answer

True or False: If A and B are two independent events then P(A and B)=P(A).P(B).

asked Jan 10, 2013 by sreemathi.v

1 answer

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