Recent questions tagged q79

A uniform conducting wire of length $12a$ and resistance R is wound up as a current carrying coil in the shape of an equilateral triangle of side a. the coil is connected to a voltage source of $V_0$ Find the magnetic of the coil .

asked Jul 31, 2015 by meena.p

1 answer

An electron and a proton equal momenta, enter a uniform magnetic field at right angles to the field lines. What will be the ratio of the radii of an vature of there trajectories .

asked Jul 21, 2015 by meena.p

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The resistivity of the alloy mangain is nearly ____(independent of /increase rapidly) with increase of temperature

asked Jul 2, 2015 by meena.p

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For the non- stoichiometre reaction 2A + B $\rightarrow$ C + D , the following kinetic data were obtained in three separate experiments, all at 298 K.

asked Apr 7, 2014 by sreemathi.v

1 answer

The unique property of DNA to synthesis an exact copy of itself is called

asked Mar 30, 2014 by thanvigandhi_1

1 answer

German silver does not have silver in it,its composition is

asked Mar 20, 2014 by meena.p

1 answer

At $300\: K$, the standard enthalpies of formation of $C_6H_5COOH(s), CO_2(g)\: and\: H_2O(l)\: are\: -408, -393\: and\: -286 \: kJ/mol$ respectively. Calculate the heat of combustion of benzoic acid at constant volume and at constant pressure. $(R=8.31\: J/Kmol)$

asked Mar 19, 2014 by thanvigandhi_1

1 answer

Acrylite is the commercial name of

asked Mar 12, 2014 by thanvigandhi_1

1 answer

$Fe_3O_4$ is a mixed oxide of

asked Mar 12, 2014 by meena.p

1 answer

Which of the following is the correct for the strength of bonds by s-s,p-p,s-p overlap

asked Mar 7, 2014 by sreemathi.v

1 answer

S1: In an electromagnetic wave, the average energy density of electric field is equal to the average energy density of the magnetic field \[\] S2: Electric and magnetic fields are related as $E = cB$

asked Mar 3, 2014 by thanvigandhi_1

1 answer

The compound , whose stereo-chemical formula is written below exhibits x geometrical isomers and y optical isomers.

asked Feb 26, 2014 by meena.p

1 answer

Which of the following reaction is the best choice for preparing Ethyl phenyl ether?

asked Feb 25, 2014 by sreemathi.v

1 answer

A compound $AB_x$ is formed such that A atoms are at corners and B atoms at face centre. Find the value of $x$ .

asked Feb 24, 2014 by sharmaaparna1

1 answer

For the following galvanic cell the emf will be at $25^{\large\circ}C$.$Ag/AgCl(s),KCl(0.2M\parallel KBr(0.001M).AgBr(s)/Ag$.The solubility product of $AgCl$ & $AgBr$ are $2.8\times 10^{-10}$ and $3.3\times 10^{-13}$ respectively.

asked Feb 18, 2014 by sreemathi.v

1 answer

When mercuric iodide is added to the aqueous solution of potassium iodide,the

asked Feb 14, 2014 by sreemathi.v

3 answers

Two resistors R and 2R are connected in series in a circuit. The thermal energy developed in R and 2R are in the ratio

asked Feb 13, 2014 by thanvigandhi_1

1 answer

Find the equation of an ellipse whose focus is $(-1,1)$ eccentricity is $\large\frac{1}{2}$ and the directix is $x-y+3=0?$

asked Feb 7, 2014 by sreemathi.v

1 answer

Solve : $ \bigg(4 \sin ^{-1} \log \bigg(\large\frac{d^4y}{dx^4}\bigg)\bigg)^3=x+y^2$

asked Feb 7, 2014 by meena.p

1 answer

The NOR gate can be represented by which venn diagram ?

asked Jan 30, 2014 by meena.p

1 answer

The standard deviation of -1, -2, -3, -4, -5, -6, -7 is

asked Jan 28, 2014 by thanvigandhi_1

1 answer

Tincal contains mainly

asked Jan 28, 2014 by sreemathi.v

1 answer

$Cu+H_2\quad\underrightarrow {heat}\quad Cu+x$,$ZnO+y\quad\underrightarrow{heat} \quad Zn+H_2O$,$2AgCl+H_2\rightarrow z+w$.The $y$ is

asked Jan 24, 2014 by sreemathi.v

1 answer

$SO_2+H_2O\rightarrow H_2SO_3$. $\quad H_2SO_3$ is also known as

asked Jan 21, 2014 by sreemathi.v

1 answer

If the nitrogen atom had electronic configuration $1s^7$,it would have energy lower than that of normal ground state configuration $1s^22s^22p^3$,because the electrons would be closer to the nucleus.Yet $1s^7$ is not observed because it violates

asked Jan 15, 2014 by sreemathi.v

1 answer

A line makes angle $\theta$ with both $x\:axis$ and $z\:axis$. If it makes angle $\alpha$ with $y\:axis$ and $\sin^2\alpha=2 \sin^2\theta$ then $\cot^2\theta=?$

asked Jan 6, 2014 by rvidyagovindarajan_1

1 answer

Given $4$ numbers, the first $3$ numbers are in $AP$ and the last $3$ numbers are in $GP$. The $1^{st}$ and $3^{rd}$ terms add upto $2$ and the $2^{nd}$ and $4^{th}$ terms add to $17$. Find the numbers.

asked Jan 6, 2014 by yamini.v

1 answer

Let $f:R\to R$ be such that $f(1)=3$ and $f'(1)=6$.Then $\lim\limits_{x\to 0}\bigg[\large\frac{f(1+x)}{f(1)}\bigg]^{1/x}$ equals

asked Dec 30, 2013 by sreemathi.v

1 answer

With which one of the following elements silicon should be doped so as to give $p$ type of semiconductor?

asked Dec 17, 2013 by thanvigandhi_1

0 answers

The flagellum in Astasia is :

asked Dec 10, 2013 by thanvigandhi_1

0 answers

If $\overrightarrow a=\hat i+\hat j-\hat k,\:\overrightarrow b=-\hat i+2\hat j+\hat k\:\:and\:\:\overrightarrow c=-\hat i+2\hat j-\hat k$, then a unit vector $\perp$ to $\overrightarrow a+\overrightarrow b$ and $\overrightarrow b+\overrightarrow c$ is ?

asked Dec 6, 2013 by rvidyagovindarajan_1

1 answer

The filaments in the cilia of protozoans are made up of a protein called

asked Dec 5, 2013 by thanvigandhi_1

0 answers

$Mg_3N_2+6D_2O\rightarrow x$

asked Nov 29, 2013 by sreemathi.v

1 answer

$pH$ of $Ca(OH)_2$ solution is 12. Millimoles of ($Ca(OH)_2$) present in 100 mL of solution will be

asked Nov 27, 2013 by mosymeow_1

1 answer

The protein efficiency ratio is :

asked Nov 26, 2013 by thanvigandhi_1

0 answers

The application of polymerase Chain Reaction is :

asked Nov 15, 2013 by thanvigandhi_1

0 answers

Observe the following statements:I. If $dy+2xy\;dx=2e^{-x^{2}} dx $ then $ye^{x^{2}}=2x+c$ II. If $ye^{-x^{2}}-2x=c$ then $dx=(2e^{-x^{2}}-2xy)dy$ Which of the following is a correct statement ?

asked Nov 13, 2013 by meena.p

1 answer

The solution of $(1+x^2) \large\frac{dy}{dx}$$+2xy-4x^2=0$ is :

asked Nov 7, 2013 by meena.p

1 answer

Which of the following statements are correct ?

asked Oct 30, 2013 by thanvigandhi_1

1 answer

$8g$ of sulphur are burnt to form $SO_2$,which is oxidized by $Cl_2$.The solution is treated with $BaC_2$ solution.The amount of $BaSO_4$ percipitated is

asked Oct 29, 2013 by sreemathi.v

1 answer

The solution of $\large\frac{dy}{dx}=\frac{y^2}{xy-x^2}$ is

asked Oct 28, 2013 by meena.p

1 answer

Identify the set of hormones that are not antagonistic in function

asked Oct 19, 2013 by thanvigandhi_1

1 answer

The solution of the differential equation $\large\frac{dy}{dx}$$-y \tan x=e^x \sec x$ is

asked Oct 18, 2013 by meena.p

1 answer

The area of $\Delta$le ABC in which $a=2,b=2.\angle C=60^{\large \circ}$ is

asked Oct 11, 2013 by sreemathi.v

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