Recent questions tagged q75

A long straight wire carrying current of $25\;A$ rests on a table as shown in the figure. Another wire $PQ$ of length $1\;m$ mass $2.5\;g$ carries the same current but in the opposite direction. the wire $PQ$ is free opposite direction. The wire PQ is free to slide up and down . To what height will PQ rise ?

asked Jul 31, 2015 by meena.p

1 answer

A coil of 200 turns has a cross -sectional area $900 mm^2$ . if carries a current of 2 ampere . The plane of the coil is perpendicular to a uniform magnetic field of $0.5 \;T$ Calculate the magnetic moment of the coil.

asked Jul 21, 2015 by meena.p

1 answer

State curies's law in magnetism?

asked Jul 21, 2015 by meena.p

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A low voltage supply from which one needs high currents must have low internal resistance why ?

asked Jul 2, 2015 by meena.p

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Two point charges $+9e$ and $e$ are seperated by 412\;cm4 in air. determine the position of the point at which the resultant electric is zero.

asked Apr 28, 2015 by meena.p

1 answer

Which of the following statements is not correct ?

asked Aug 1, 2014 by thanvigandhi_1

1 answer

True-or-False :If $\tan(\pi \cos \theta)=\cot (\pi \sin \theta)$,then $\cos(\theta-\large\frac{\pi}{4})$$=\pm \large\frac{1}{2\sqrt 2}$

asked May 20, 2014 by sreemathi.v

1 answer

On heating an aliphatic primary amine with chlooroform and ethanolic potassium hydroxide, the organic compound formed is:

asked Apr 7, 2014 by sreemathi.v

1 answer

The monosaccharide which is more sweater than sucrose is

asked Mar 30, 2014 by thanvigandhi_1

1 answer

Mac Arthur Process is used for

asked Mar 20, 2014 by meena.p

1 answer

Calculate the resonance energy of $N_2O$ from the following data: \[\]$ \Delta H_f^{\circ}$ of $N_2O = 82 \: kJ/mol$, Bond energies of $N≡N,\: N=N,\: O=O \: and\: N=O$ bonds are $946,\: 418,\: 498\: and\: 607\: kJ/mol$ respectively

asked Mar 19, 2014 by thanvigandhi_1

1 answer

PHBV IS an example for

asked Mar 12, 2014 by thanvigandhi_1

1 answer

$4FeCl_3+3K_4Fe(CN)_6 \longrightarrow (x)+12KCl$ the x formed :

asked Mar 12, 2014 by meena.p

1 answer

$Mg_2C_3$ reacts with water forming propyne.$C_3^{4-}$ has how many sigma and pi bonds respectively

asked Mar 7, 2014 by sreemathi.v

1 answer

An organic compound A upon reacting with $NH_3$ gives B. On heating B gives C. C in presence of $KOH$ reacts with $Br_2$ to give $CH_3CH_2NH_2$ A is :

asked Feb 25, 2014 by meena.p

1 answer

The major product formed on the reaction given below :

asked Feb 25, 2014 by sreemathi.v

1 answer

An L.P.G Cylinder contains 15kg of butane gas at $27^{\large\circ}C$ and 10 atm pressure. It was leaking and its pressure fell down to 8 atm pressure after one day. Calculate the amount of leaked gas.

asked Feb 23, 2014 by sharmaaparna1

1 answer

A circular loop of radius $R$, carrying a current $i$ lies in the $x-y$ plane with its centre at the origin. The total magnetic flux through the $x-y$ plane is

asked Feb 22, 2014 by thanvigandhi_1

1 answer

The emf of cell $Zn/ZnCl_2(0.05mol\;dm^{-3})/Ag^+/AgCl(s)/Ag$ is 1.015V at 298K,the silver electrode being positive,while the temperature coefficient of its emf is $-0.00492VK^{-1}$.Write down the equation for reaction occuring when the cell is allowed to discharge and calculate changes in free energy(G)?

asked Feb 18, 2014 by sreemathi.v

1 answer

Which is true about enthalpy of solution containing benzene and toluene?

asked Feb 14, 2014 by sreemathi.v

1 answer

Solve: $ (e^x+e^{-x} )\large\frac{dy}{dx}$$=1- \large\frac{(e^x+e^{-x})^2}{(e^x-e^{-x})}$$y$

asked Feb 6, 2014 by meena.p

1 answer

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

asked Feb 6, 2014 by sreemathi.v

1 answer

Given the following VI-Characteristic curve of a pn-junction diode, identify what is (A) and (B)?

asked Jan 30, 2014 by meena.p

1 answer

Considering greater polarization in lid compared to that in NaCl,which of the following statements you would expect to be wrong?

asked Jan 28, 2014 by sreemathi.v

1 answer

The median of the variables \[\] $x+4, x-\large\frac{7}{2},$$ x-\large\frac{5}{2},$$4 x-3, x-2$ \[\] $ x+\large\frac{1}{2}, x-\large\frac{1}{2}$$, x+5\: \: x > 0 $ is

asked Jan 27, 2014 by thanvigandhi_1

1 answer

The hydride gap is used for element of group?

asked Jan 24, 2014 by sreemathi.v

1 answer

Sinks of carbon monoxide $2CO+O_2\qquad \underrightarrow {soil}\qquad x$.$CO+3H_2\qquad\underrightarrow{soil}\qquad y+z$.The $x$ in the equation is

asked Jan 21, 2014 by sreemathi.v

1 answer

The electrons,identified by quantum number n and l,(i) n=4,l=1;(ii) n=4,l=0;(iii) n=3,l=2;(iv) n=3,l=1 can be placed into order of increasing energy,from the lowest to highest,as :

asked Jan 15, 2014 by sreemathi.v

1 answer

A line with direction ratio $(2,1,2)$ meets the lines $x=y+a=z\:\;and\:\:x+a=2y=2z$. The coordinates of the points of intersections are ?

asked Jan 6, 2014 by rvidyagovindarajan_1

1 answer

For what value of n , the $n^{th}$ term of the GPs 2560,1280,640 ----- and 10,20,40 ------ are equal.

asked Jan 6, 2014 by yamini.v

1 answer

$\lim\limits_{x\to \infty}\large\frac{x^n}{e^x}$$=0$ for

asked Dec 30, 2013 by sreemathi.v

1 answer

Integrate : $\int \bigg( x^2 +\large\frac{1}{x^2}\bigg)^3$$ dx$

asked Dec 18, 2013 by meena.p

1 answer

Number of moles of $ MnO_4^-$ required to oxidise one mole of ferrous oxalate completely in acidic medium will be :

asked Dec 17, 2013 by thanvigandhi_1

0 answers

Aristotle's lantern is useful in :

asked Dec 9, 2013 by thanvigandhi_1

0 answers

Spicules made of silica are found in

asked Dec 5, 2013 by thanvigandhi_1

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$|\overrightarrow a\times\overrightarrow b|^2= ?$ (which one of the following )

asked Dec 3, 2013 by rvidyagovindarajan_1

1 answer

Orthosilicates have

asked Nov 29, 2013 by sreemathi.v

1 answer

Which of the following solutions will have $pH$ of 4.74?

asked Nov 27, 2013 by mosymeow_1

1 answer

If the red flowered F1 hybrid from the cross of red x White peas is crossed with recessive white flowered parent, the ratio in the offsprings is :

asked Nov 26, 2013 by thanvigandhi_1

0 answers

Match the following in Drosophila with reference to *** determination :

asked Nov 15, 2013 by thanvigandhi_1

0 answers

If $\int \sin ^{-1} \bigg( \large\frac{2x}{1+x^2}\bigg) $$dx-=f(x)-\log (1+x^2)+c$ then $f(x) $ is equal to :

asked Nov 13, 2013 by meena.p

1 answer

Dividing the interval [0,6] into 6 equal parts and by using trapezoidal rule the value of $\int \limits_0^6 x^3 dx$ is approximately:

asked Nov 7, 2013 by meena.p

1 answer

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