Recent questions tagged q114

Four particles have speed 2,3,4 and 5 cm/sec respectively. Their RMS speed is

asked Mar 2, 2014 by sharmaaparna1

1 answer

Which of the following have zero dipole moment ? $(i)\; H_2;\; (ii)\;HF;\; (iii)\; CH_4; \; (iv) CHCl_3$

asked Feb 28, 2014 by meena.p

1 answer

The below reaction is known as

asked Feb 27, 2014 by sreemathi.v

1 answer

Find the equation of tangent for the hyperbola $\large\frac{x^2}{a^2}-\frac{y^2}{b^2}$$=1$?

asked Feb 10, 2014 by sreemathi.v

1 answer

If $1^4+2^4+3^4+.....n^4$ = $an^5+bn^4+cn^3+dn^2+en+f$, find $a$

asked Jan 20, 2014 by yamini.v

1 answer

Calculate the wavelength emitted during the transition of electron in between two levels of $Li^{+2}$ ion whose sum is 4 and difference is 2.

asked Jan 16, 2014 by sreemathi.v

1 answer

If $\overrightarrow a=\hat i+\hat j+\hat k,\:\:\overrightarrow c=\hat j-\hat k$ and $\overrightarrow b$ is such that $\overrightarrow a\times\overrightarrow b=\overrightarrow c\:\:and\:\:\overrightarrow a.\overrightarrow b=3$ then $\overrightarrow b=?$

asked Jan 7, 2014 by rvidyagovindarajan_1

1 answer

The values of $p$ and $q$ for which the function $f(x)=\left\{\begin{array}{1 1}\large\frac{\sin(p+1)x+\sin x}{x} & x < 0 \\ q & x=0 \\ \large\frac{\sqrt{x+x^2}-\sqrt x}{x^3/2} & x > 0 \end{array}\right.$ is continuous for all $x\;in\;R$ are

asked Dec 31, 2013 by sreemathi.v

1 answer

Integrate : $\int \cos (4x+5) dx$

asked Dec 20, 2013 by meena.p

1 answer

Carbohydratesare commonly found as starch in plant storage organs. Which of the following five properties of starch (a-e) make it useful as a storage material ?

asked Dec 18, 2013 by thanvigandhi_1

0 answers

A wire of length 6.28 m is bent into a circular coils of 2 turns. If a current of 0.5 A exists in the coil, the magnetic moment of the coil is, in $ A-M^2$ :

asked Nov 18, 2013 by thanvigandhi_1

1 answer

If $ \overline B$ is the magnetic induction, at the centre of a circular coil of radius 'r' carrying a current is 1 T then its value at a distance of $ \sqrt 3 \: r$ on the axis from the centre of the coil is:

asked Nov 4, 2013 by thanvigandhi_1

1 answer

In galvanometer $5\%$ of the total current in the circuit passes through it. If the resistance of the galvanometer is G the shunt resistance 'S' connected to the galvanometer is

asked Oct 20, 2013 by meena.p

1 answer

A radioactive substance has density $ \rho$ , volume V, and decay constant $ \lambda$. If the molecular weight of the substance is M, and Avogadro number is $N_a$ then the radioactivity of the substance after time 't' is

asked Oct 20, 2013 by thanvigandhi_1

1 answer

A photon of energy 'E' ejects a photo electron from a metal surface whose work function is $W_0$. If this electron enters into a uniform magnetic field of induction 'B' in a direction perpendicular to the field and describes a circular path of radius 'R' , then the radius 'r' is given by , (in the usual notation):

asked Oct 14, 2013 by meena.p

2 answers

The purpose of using heavy water in nuclear reactor is

asked Oct 12, 2013 by thanvigandhi_1

1 answer

The intensity of the magnetic induction field at the center of a single turn circular coil of radius 5 cm carrying current of $0.9A$:

asked Sep 30, 2013 by meena.p

1 answer

Two identical condenser M and N are connected in series with a battery. The space between the plates of M is completely filled with a dielectric medium of dielectric constant 8 and a copper plate of thickness $\large\frac{d}{2}$ is introduced between the plates of N. (d is the distance between the plates). Then potential differences across M and N are, respectively , in the ratio:

asked Sep 24, 2013 by meena.p

1 answer

The sensitivity of a galvanometer that measures current is decreased by $\large\frac{1}{40}$ times by using shunt resistance of $10 \;\Omega$. Then, the value of the resistance of the galvanometer is

asked Sep 18, 2013 by meena.p

1 answer

A monoid becomes a group if it also satisfies the

asked May 24, 2013 by poojasapani_1

1 answer

The eccentricity of the hyperbola with asymptotes $x+2y-5=0 ,2x-y+5=0 $ is

asked May 14, 2013 by poojasapani_1

1 answer

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