Recent questions tagged q83

Five long wires $A,B,C,D$ and $E$ each carrying current I are arranged to form edges of a pentagonal prism as shown in figure. Each carries current out of the plane of paper . What will be the magnetic induction at a point on the axis =0 ? Axis is at a distance R from each wire ?

asked Aug 3, 2015 by meena.p

1 answer

A multi range current meter can be constructed by using a galvanometer circuit as shown in figure . We want a current meter that can measure $10\;mA,100\;mA$ and $1\;A$ using a galvanometer of resistance $10 \Omega$ and that produces maximum deflection for current $1\;mA$ Find $S_1,S_2$ and $S_3$ that have to be used

asked Aug 3, 2015 by meena.p

1 answer

A magnetic dipole is situated in the direction of a magnetic field . What is its potential energy ?

asked Jul 21, 2015 by meena.p

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Given n resistor each resistance R, What is the ratio of the maximum to minimum resistance ?

asked Jul 3, 2015 by meena.p

1 answer

A particular of mass m and charge $(-q)$ enters the region between the two charged plates initially moving along x-axis with speed $V_x $ (like particle 1 in the figure) . The length of plate of L and a uniform electricity field E is maintained between the plates. she that the vertical deflection of the particle at the fan edge of the plate is 4qEl^2/2mv_x ^2$. Compare this motion with motion of a projectile in gravitational field.

asked Apr 29, 2015 by meena.p

1 answer

The correct set of four quantum numbers for the value electrons of rubidium atom (Z = 37) is

asked Apr 7, 2014 by sreemathi.v

1 answer

Methyl $ \alpha$-D glucoside and methyl $ \beta$-D glucoside are

asked Mar 30, 2014 by thanvigandhi_1

1 answer

From the given data, calculate the enthalpy of combustion of cyclopropane at $298 \: K$. The enthalpy of formation of $CO_2(g), H_2O(l)$ and propene(g) are $-393.5, -285.8$ and $20.42 \: kJ/mol$ respectively. The enthalpy of isomerisation of cyclopropane to propene is $-33 \: kJ/mol$

asked Mar 20, 2014 by thanvigandhi_1

1 answer

The trade name of polyacrilonitrile is

asked Mar 12, 2014 by thanvigandhi_1

1 answer

Percentage of silver in the all by german silver is :

asked Mar 12, 2014 by meena.p

1 answer

Which of the following is the correct order of decreasing ionic size is

asked Mar 7, 2014 by sreemathi.v

1 answer

Electromagnetic waves travel in a medium at a speed of $2 \times 10^8 m/s$. The relative permeability of the medium is $1$. Calculate the relative permittivity.

asked Mar 4, 2014 by thanvigandhi_1

1 answer

Which of the following conformations cyclohexane is chiral?

asked Feb 26, 2014 by meena.p

1 answer

Find the co-ordination number of sodium in $Na_2O$.

asked Feb 25, 2014 by sharmaaparna1

0 answers

In the below reaction product is/are

asked Feb 25, 2014 by sreemathi.v

1 answer

The EMF of cell Hg/mercurous nitrate (0.01M)$\parallel$ mercurous nitrate (0.1M)/Hg was found to be 0.0295V at $25^{\large\circ}C$ .Then molecular formula of mercurous nitrate is

asked Feb 18, 2014 by sreemathi.v

1 answer

At room temperature $25^{\large\circ}C$,the vapour pressure of pure methyl alcohol is 92 torr.Mol fraction of $CH_3OH$ in a solution in which vapour pressure of $CH_3OH$ is 24 torr at $25^{\large\circ}$ is ?

asked Feb 14, 2014 by sreemathi.v

1 answer

For what value of $\lambda$ does the line $y=x+\lambda$ touches the ellipse $\large\frac{x^2}{36}+\frac{y^2}{25}$$=1$?

asked Feb 7, 2014 by sreemathi.v

1 answer

Find nature of curve not passing through origin for which tangent at any point P. on curve is equal to radius vector of point P.

asked Feb 7, 2014 by meena.p

1 answer

In the circuit given below if the output $D=1$ the input must be

asked Jan 31, 2014 by meena.p

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The coefficient of correlation $r$ is independent of

asked Jan 29, 2014 by thanvigandhi_1

1 answer

Glauber salt is a

asked Jan 28, 2014 by sreemathi.v

1 answer

$4LiH+AlCl_3\quad\underrightarrow{\text{dry ether}}\quad x+y$. $x$ is

asked Jan 24, 2014 by sreemathi.v

1 answer

$2SO_2+O_2+x\rightarrow 2H_2SO_4$.The $x$ is

asked Jan 22, 2014 by sreemathi.v

1 answer

If a, b and c are in H.P, then a/(b+c), b/(c+a), c/(a+b) are in

asked Jan 17, 2014 by yamini.v

1 answer

Iodine molecule dissociates into atoms after absorbing light of 4500$A^{\circ}$ .If one quantum of radiation is absorbed by each molecule,calculate the kinetic energy of iodine atoms (Bond energy of $I_2=240KJmol^{-1}$)

asked Jan 15, 2014 by sreemathi.v

1 answer

The equation of projection of the line $\large\frac{x-1}{2}=\frac{y-2}{1}=\frac{z-3}{3}$ on the plane $x+y+z=1$ is given by ?

asked Jan 8, 2014 by rvidyagovindarajan_1

1 answer

If $x_1=1$ and $x_{n+1}=\large\frac{4+3x_n}{3+2x_n}\qquad$$n \geq 1$ and if $\lim\limits_{n\to \infty}x_n=l$ then l is

asked Dec 30, 2013 by sreemathi.v

1 answer

Integrate : $\int\large\frac{\cos 2x}{\cos ^ 2 x} $$dx$

asked Dec 18, 2013 by meena.p

1 answer

Four diatomic species are listed below in different sequences. Which of these presents the correct order of their increasing bond order ?

asked Dec 17, 2013 by thanvigandhi_1

0 answers

Schuffner's dots produced by plamodium are :

asked Dec 10, 2013 by thanvigandhi_1

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If $\overrightarrow a\times\overrightarrow b+\overrightarrow b\times\overrightarrow c+\overrightarrow c\times\overrightarrow a$ and $\overrightarrow a+\overrightarrow b+\overrightarrow c$ are $\perp$ then $\overrightarrow a,\:\overrightarrow b\:\overrightarrow c$ are .....

asked Dec 7, 2013 by rvidyagovindarajan_1

1 answer

The Ovoviviparous parasite is

asked Dec 5, 2013 by thanvigandhi_1

1 answer

A gas decolourises $Br_2$ in $CCl_4$ and forms a precipitate with Ammoniacal silver nitrate .The gas is

asked Nov 29, 2013 by sreemathi.v

1 answer

$pH$ of a mixture of 1 M benzoic acid ($pK_a$ = 4.20) and 1 M solution benzoate is 4.5. In 300 mL of buffer solution, volume of benzoic acid solution is

asked Nov 27, 2013 by mosymeow_1

1 answer

The description of amoeboid movement like spreading of a water drop on an uneven surface of a glass plate is :

asked Nov 27, 2013 by thanvigandhi_1

0 answers

An electron moving at a speed of $ 5 \times 10^6\: ms^{-1}$ is shot through a sheet of paper which is $ 2.1 \times 10^{-4}\: cm$ thick. The electron emerges from the paper with speed of $ 2 \times 10^6\: ms^{-1}$ . The time taken by the electron in seconds to pass through the paper sheet is :

asked Nov 15, 2013 by thanvigandhi_1

1 answer

A source of sound producing wavelength 50 cm is moving away from a stationary observer with $ \large\frac{1}{5}th$ speed of sound. Then what is the wavelength of sound heard by the observer?

asked Nov 1, 2013 by thanvigandhi_1

1 answer

How many moles of magnesium phosphate $Mg(PO_4)_2$ will contain 0.25 mole of oxygen atom ?

asked Oct 30, 2013 by sreemathi.v

1 answer

A current of 16 A is made to pass through a conductor in which the number density of free electrons is $ 4 \times 10^{28}m^{-3}$ and its area of cross section is $ 10^{-5}m^2$. The average drift velocity of free electrons in the conductor is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

A body thrown vertically up to reach its maximum height in t seconds. The total time from the time of projection to reach a point at half of its maximum height while returning (in seconds) is

asked Oct 18, 2013 by meena.p

1 answer

The value of $\cos[2\tan^{-1}(-7)]$ is

asked Oct 11, 2013 by sreemathi.v

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A particle is projected up from a point at an angle $\theta$ with the horizontal direction. At any time $'t'$, if p is the linear momentum , y is the vertical displacement ,'x' is horizontal displacement , the graph among the following which does not represent the variation of kinetic 'k' of the particle is:

asked Oct 11, 2013 by meena.p

1 answer

A small angled prism of refractive index 1.4 is combined with another small angled prism of refractive index 1.6 to produce dispertion without deviation. If the angle of first prism is $6^{\circ}$ , the angle of the second prism is

asked Oct 8, 2013 by thanvigandhi_1

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