Recent questions tagged q71

A current carrying loop consists of 3 identical quarter circles of radius R, lying in the positive quadrants of $x-y ,y-z$ and $z-x$ planes , with their centers at the origin joined together . Find the direction and magnitude to $\overrightarrow{B}$ at the origin .

asked Jul 30, 2015 by meena.p

1 answer

A magnetic needle of a magnetic moment $60 Am^2$ is placed at a place . The needle points towards the geographical north. using the data given below, find the value of declination at the point . Horizontal component of earth magnetic field $=40 \times 10^{-6}wb m^{-2}$ and torque experienced by the needle $=1.2 \times 10^{-3}Nm$

asked Jul 20, 2015 by meena.p

1 answer

Two wires of equal lengths , One of aluminium and the other of copper have the same resistance . Which of the two wires is lighter. $[\rho_A =2.63 \times 10^{-8} \Omega m, \rho_{cn}= 1.72 \times 10^{-8} \Omega -m$. Relative density of $Al =2.7$ , Relative density of $Cu= 8.9 ]$

asked Jul 2, 2015 by meena.p

1 answer

Which of the following is the ore of mercury ?

asked Aug 1, 2014 by thanvigandhi_1

1 answer

True-or-False :$\cos \large\frac{2\pi}{15}$$\cos \large\frac{4\pi}{15}$$\cos \large\frac{8\pi}{15}$$\cos \large\frac{16\pi}{15}=\frac{1}{16}$

asked May 20, 2014 by sreemathi.v

0 answers

The equivalent conductance of NaCl at concentration C and at infinite dilution are $\lambda_C$ and $\lambda_{\infty}$ respectively.The correct relationship between $\lambda_C$ and $\lambda_{\infty}$ is given as : (where the constant B is positive)

asked Apr 7, 2014 by sreemathi.v

1 answer

In both DNA and RNA heterocyclic base and phosphate ester linkages are at

asked Mar 30, 2014 by thanvigandhi_1

1 answer

Silver containing lead as impurity is removed by.

asked Mar 20, 2014 by meena.p

1 answer

Find the temperature as a function of radius r in case of a cylindrical shell whose inner surface temperature and outer surface temperature are $ \theta_1$ and $ \theta_2$. The inner and outer radii of the cylindrical shell are $r_1$ and $r_2$.

asked Mar 19, 2014 by thanvigandhi_1

1 answer

The given polymer belongs to

asked Mar 12, 2014 by thanvigandhi_1

1 answer

The spin only magnetic moment of $Cr^{x+}$ is $4.9\;BM$ . Find $x$

asked Mar 12, 2014 by meena.p

1 answer

Which of the following represent the given mode of hybridisation $sp^2-sp^2-sp-sp$ from left to right?

asked Mar 7, 2014 by sreemathi.v

1 answer

The number of structural isomers for $C_6H_{14}$ is

asked Feb 25, 2014 by meena.p

1 answer

Predict the product in the below reaction:

asked Feb 24, 2014 by sreemathi.v

1 answer

Calculate the average volume available to a molecule in a sample of nitrogen gas at STP. What is the average distance between neighbouring molecules if nitrogen molecules are spherical in nature?

asked Feb 21, 2014 by sharmaaparna1

1 answer

An electric current is passed through two electrolytic cells connected in series.One containing a solution of silver nitrate and the other solution of $H_2SO_4$.What volume of oxygen measured at $25^{\large\circ}C$ and 750mm of Hg would be liberated from $H_2SO_4$ if 1mole and of $Ag^+$ are deposited from silver nitrate solution?

asked Feb 17, 2014 by sreemathi.v

1 answer

Lowering of vapour pressure due to a solute in 1 molal aqueous solutions at $100^{\large\circ}C$ is

asked Feb 14, 2014 by sreemathi.v

1 answer

Find the position of the point (1,1) relative to the ellipse $\large\frac{x^2}{64}+\frac{y^2}{100}$=1.

asked Feb 6, 2014 by sreemathi.v

1 answer

Solve : $(x^2+1) dy =(4x+xy^2)dx$

asked Feb 6, 2014 by meena.p

1 answer

$CO+NaOH\rightarrow $?

asked Jan 28, 2014 by sreemathi.v

1 answer

In a class of 100 students there are 70 boys whose average marks in a subject are 75. If the average marks of the complete class is 72 then what is the average of the girls ?

asked Jan 26, 2014 by thanvigandhi_1

1 answer

Hydrogen reacts with different elements to from variety of hydrides.$1^{st}$ group and $2^{nd}$ group elements form white,crystalline ionic hydride their stability depends upon ionic characters and lattic energy covalent hydride is common type of hydrides transition metals form interstitial hydrides.Which ionic hydride is stable up to its mp?

asked Jan 24, 2014 by sreemathi.v

1 answer

Organic matter+$O_2\qquad\underrightarrow{\text{Aerobic organisms}}\qquad x+y$.The $x$ in the equation is

asked Jan 21, 2014 by sreemathi.v

1 answer

Which has maximum number of unpaired electron :

asked Jan 15, 2014 by sreemathi.v

1 answer

Distance of a point $P(\overrightarrow c)$ from the the line $\overrightarrow r=\overrightarrow a+\lambda \overrightarrow b$ is ?

asked Jan 6, 2014 by rvidyagovindarajan_1

1 answer

Given an AP, if the sum of first 5 terms is 175 and the sum of first 10 terms is 700, find the sum of the first 7 terms.

asked Jan 6, 2014 by yamini.v

1 answer

$\lim\limits_{x\to \infty}[x-\sqrt{x^2+x}]$=

asked Dec 24, 2013 by sreemathi.v

1 answer

Integrate : $\int \large\frac{1}{1+\cos x }$$ dx$

asked Dec 17, 2013 by meena.p

1 answer

The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr(24) and Mn (25) is :

asked Dec 17, 2013 by thanvigandhi_1

0 answers

Trichonympha lives as a symbiont in the alimentary canal of :

asked Dec 9, 2013 by thanvigandhi_1

0 answers

The ultimate unit in trinomial nomenclature is

asked Dec 5, 2013 by thanvigandhi_1

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If $\overrightarrow {AB}=3\hat i+\hat j-2\hat k,\:and \:\overrightarrow {AC}=-\hat i+3\hat j+4\hat k$ are two sides af the $\Delta ABC$, then the length of the median through $A$ is ?

asked Dec 1, 2013 by rvidyagovindarajan_1

1 answer

The formulae of ferric alum

asked Nov 28, 2013 by sreemathi.v

1 answer

A weak base, B has basicity constant, $K_b = 2 \times 10^{-5}$. The $pH$ of any solution in which $[B] = [BH^+]$ is

asked Nov 27, 2013 by mosymeow_1

1 answer

The term Gristle is also, used for

asked Nov 26, 2013 by thanvigandhi_1

0 answers

The inability to regulate the concentration of sodium ions in the blood could be due to the improper functioning of one of the following :

asked Nov 14, 2013 by thanvigandhi_1

0 answers

If $\int \large\frac{\sin x}{\cos x(1+\cos x)dx}$$=f(x)+c$ then $f(x)$ is equal to :

asked Nov 13, 2013 by meena.p

1 answer

If $f(x,y )= \large\frac{\cos (x-4y)}{\cos (x+4y)}$, then $\large\frac{\partial f}{\partial x} \bigg|_{y-\large\frac{x}{2}}$ is equal to :

asked Nov 6, 2013 by meena.p

1 answer

Match the following

asked Oct 30, 2013 by thanvigandhi_1

1 answer

If $30ml$ of $H_2$ and $20ml$ of $O_2$ react to form water,what is left at the end of the reaction

asked Oct 29, 2013 by sreemathi.v

1 answer

If $ \int \large\frac{e^x-1}{e^x+1}$$dx=f(x)+c$, then f(x) is equal to

asked Oct 28, 2013 by meena.p

0 answers

Statement (S) : Carbon dioxide produced as a result of cellular respiration combines with water to form carbonic acid that increases the blood pH. Reasons (R) : $CO_2$ must be eliminated from the body to maintain homeostatis.

asked Oct 18, 2013 by thanvigandhi_1

1 answer

If $ \int e^x \bigg(\large\frac{1- \sin x}{1-\cos x}\bigg)$$dx-f(x)+constant$ then $f(x)=$

asked Oct 18, 2013 by meena.p

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