Recent questions tagged q80

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

asked Jul 31, 2015 by meena.p

1 answer

Name the material used in making the core of moving coil galvanometer .

asked Jul 21, 2015 by meena.p

1 answer

The resistivity of a typical insulator (eg: amber) is greater than that of a metal by a factor of the order of ____$(10^{22}/10^{23})$

asked Jul 2, 2015 by meena.p

1 answer

A hollow charged conductor has a tiny hole cut into its surface . show that the electric field in the hole is $ \bigg( \large\frac{\sigma}{2 \in_0}\bigg)$$\hat n$, where $\hat n$ is the unit vector in the outward normal direction and $\sigma$ is the surface change density near the hole.

asked Apr 28, 2015 by meena.p

1 answer

Which series of reactions correctly respensents chemical relations related to iron and its compound?

asked Apr 7, 2014 by sreemathi.v

1 answer

The chemical changes in DNA molecule that could lead to synthesis of protein with an altered amino acid sequence is called

asked Mar 30, 2014 by thanvigandhi_1

1 answer

Zone Refing is generally carried out in inert atmosphere

asked Mar 20, 2014 by meena.p

1 answer

Enthalpy change involved in the oxidation of glucose is $-2880\: kJ/mol$. Twenty five percent of this energy is available for muscular work. If $100\: kJ$ of muscular work is required to walk one kilometer, what is the maximum distance that a person will be able to walk after eating $120g$ of glucose.

asked Mar 19, 2014 by thanvigandhi_1

1 answer

Which one of the following polymer is used for making nonstick utensils

asked Mar 12, 2014 by thanvigandhi_1

1 answer

Brass is a alloy of

asked Mar 12, 2014 by meena.p

1 answer

Magnetic moment of $K_3Mn(C_2O_4)_3.3H_2O$ is

asked Mar 7, 2014 by sreemathi.v

1 answer

Which of the following statements is correct in relation to electromagnetic waves in an isotropic medium? (a) Energy due to electric field is equal to that due to magnetic field. (b) Electric vector E and, magnetic vector B are in phase. (c) For a given amplitude of E vector, the intensity increases as the first power of frequency f (d) For cylindrical wave fronts, the amplitude of the wave varies in proportion to $ \large\frac{1}{r^2}$ , where $r$ is the radius of the wave front.

asked Mar 4, 2014 by thanvigandhi_1

1 answer

Toutomerism is not exhibited by

asked Feb 26, 2014 by meena.p

1 answer

What would be the product in the following reaction:

asked Feb 25, 2014 by sreemathi.v

1 answer

Ice crystallizes in hexagonal lattice. At the low temperature at which structure was determined the lattice constants were $a = 4.53A^{\large\circ}$ and C = $b = 7.41A^{\large\circ}$ .Calculate the no. of $H_2O$ molecules present in a unit cell. (Density of ice = 0.92g/cm)

asked Feb 24, 2014 by sharmaaparna1

1 answer

The EMF of electrode -concentration cell $Zn-Hg(C_1)/Zn^{+2}(aq)/Zn-Hg(C_2)$ at $25^{\large\circ}C$ if the concentration of zinc amalgam are $C_1=2g$ per 100g of mercury and $C_2=1g$ per 100g of mercury.

asked Feb 18, 2014 by sreemathi.v

1 answer

At room temperature $25^{\large\circ}C$,the expression for total pressure of mixture of methanol and ethanol solution is given by P(in torr)$=135+120X$ where $X$ is mol fraction of methanol,Hence

asked Feb 14, 2014 by sreemathi.v

1 answer

Find the length of major and minor axes of the ellipse $3x^2+2y^2=6$?Also find its eccentricity?

asked Feb 7, 2014 by sreemathi.v

1 answer

Form a differential equation represent family of curve given by $y= (c_1+c_2) -\sin (x+c_3)-c_4 e^{x+c_5}$

asked Feb 7, 2014 by meena.p

1 answer

The following circuit can be reduced to what type of a gate?

asked Jan 30, 2014 by meena.p

1 answer

If the coefficient of variation of a distribution is 45% and the mean is 12 then its standard deviation is

asked Jan 29, 2014 by thanvigandhi_1

1 answer

The alkali metal bi carbonate that has no existance in solid state is

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 $z$ is

asked Jan 24, 2014 by sreemathi.v

1 answer

$NO_2$ combines with atmospheric moisture to form mixture of $2NO_2+H_2O\rightarrow x+y$.The x is

asked Jan 21, 2014 by sreemathi.v

1 answer

The quantum numbers $\large\frac{1}{2}$ and $-\large\frac{1}{2}$ for the electron spin represents :

asked Jan 15, 2014 by sreemathi.v

1 answer

The equation of the plane which makes double the intercepts of the plane $3x+6y-z+12=0$ is ?

asked Jan 7, 2014 by rvidyagovindarajan_1

1 answer

Ram shares a photo link on facebook with 3 persons and requests each of them to share with 3 more persons and continue the chain. For every share of the photo link if Rs 100 is donated to the Adyar Cancer society, what is the total amount collected by the society till the $b^{th}$ set of shares.

asked Jan 6, 2014 by yamini.v

1 answer

$\lim\limits_{h\to 0}\large\frac{f(2h+2+h^2)-f(2)}{f(h-h^2+1)-f(1)}$ given that $f'(2)=6$ and $f'(1)=4$

asked Dec 30, 2013 by sreemathi.v

1 answer

Integrate : $\int \sin ^2 x. \cos ^2 x \;dx$

asked Dec 18, 2013 by meena.p

1 answer

In which of the following coordination entities the magnitude of $ \Delta\: o$ (C F S E in octahedral field ) will be maximum ?

asked Dec 17, 2013 by thanvigandhi_1

0 answers

The cyst wall of Euglena is made tip

asked Dec 10, 2013 by thanvigandhi_1

1 answer

If $\overrightarrow a=p\hat i+3\hat j+4\hat k\:\:and\:\:\overrightarrow b=\sqrt q\hat i+5\hat k$ are two vectors of same magnitude, then no. of values of $(p,q)$ are?

asked Dec 6, 2013 by rvidyagovindarajan_1

1 answer

Metaboly is related to

asked Dec 5, 2013 by thanvigandhi_1

0 answers

$2D_2O\overset{electrolysis}{\rightarrow}$

asked Nov 29, 2013 by sreemathi.v

1 answer

Assuming 100% ionization in case of strong electrolytes which of the following will have minimum $pH$?

asked Nov 27, 2013 by mosymeow_1

1 answer

Which age group chicks are affected by Gumboro disease ?

asked Nov 26, 2013 by thanvigandhi_1

0 answers

Match the following

asked Nov 15, 2013 by thanvigandhi_1

0 answers

If $\large\frac{dy}{dx}=\frac{y+ x \tan \Large\frac{y}{x}}{x}$ then $\sin \large\frac{y}{x}$ is equal to :

asked Nov 13, 2013 by meena.p

1 answer

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

asked Nov 7, 2013 by meena.p

1 answer

Statement (S) : * influenced genes are autosomal genes in both males and females. Reasons (R) : The phenotypic expression of *-influenced genes is different in different sexes, dominant in one *** and recessive in the other.

asked Oct 30, 2013 by thanvigandhi_1

1 answer

$3.92g$ of ferrous ammonium sulphate crystals are dissolved in 100ml of water.20ml of this solution requires 18ml of potassium permanganate during titration for complete oxidation .The weight of $KMnO_4$ present in one litre of the solution is

asked Oct 29, 2013 by sreemathi.v

1 answer

The solution of $\large\frac{dy}{dx}$$+1=e^{x+y}$ is

asked Oct 28, 2013 by meena.p

1 answer

Thermoreceptor sensillea of Cockroach are located on

asked Oct 19, 2013 by thanvigandhi_1

1 answer

The solution of the differential equation $xy^2 dy-(x^3+y^3)dx=0$ is

asked Oct 18, 2013 by meena.p

1 answer

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