Recent questions tagged q76

A 100 turn rectangular coil $ABCD$ is hung from one arm of a balance(as shown in the figure) . A mass 500 g is added to the other arm to balance the weight of the coil . A current $4.9\;A$ passes through the coil and a constant magnetic field of $0.2 \;T$ acting inward (in xz plane) is switched on such that only arm CDof length 1 cm lies in the field . Hoe much additional mass 'm' must be added to regain the balance ?

asked Jul 31, 2015 by meena.p

1 answer

A high tension (HT) supply of say $6kv$ must have a very large internal resistance . Why ?

asked Jul 2, 2015 by meena.p

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As oil drop of 12 excess electron is held stationary under a constant electric field of $2.55 \times 10^4 \;N/C$ in Millikan's oil drop experiment . The density of the oil is $ 1.26\;g/cm^3$ Estimate the radius of the drop . $(g = 9.8 \;m/s^2; e = 1.60 \times 10^{-91}\;C)$

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

In the following match each item given under the column $C_1$ to its correct answer given under the column $C_2$

asked May 20, 2014 by sreemathi.v

1 answer

The correct statement for the molecule, $CsI_3$ is

asked Apr 7, 2014 by sreemathi.v

1 answer

The human body cannot digest

asked Mar 30, 2014 by thanvigandhi_1

1 answer

In goldsmith aluminothermic process, which of the following reducing agent is used.

asked Mar 20, 2014 by meena.p

1 answer

If the values of $ \Delta H_f^{\circ}\: for\: CH_4(g), C_2H_6(g), CO_2(g)\: and \: H_2O(l)$ are respectively $-74.85, -84.68, -393.5 \: and\: -286\: kJ/mol,$ predict which is more efficient fuel?

asked Mar 19, 2014 by thanvigandhi_1

1 answer

Depending on the mode of synthesis polymers are classified into

asked Mar 12, 2014 by thanvigandhi_1

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The name of the following compound is : $4FeCl_3+3K_4Fe(CN)_6 \longrightarrow (x)+12KCl$

asked Mar 12, 2014 by meena.p

1 answer

The correct order of increasing $C-O$ bond length of $CO,CO_3^{2-},CO_2$ is :

asked Mar 7, 2014 by sreemathi.v

1 answer

Given below are some famous numbers associated with electromagnetic radiations in different contexts in physics. Which of the following belongs to radio waves?

asked Mar 3, 2014 by thanvigandhi_1

1 answer

The total number of carboxylic acid groups in the product P is :

asked Feb 26, 2014 by meena.p

1 answer

Williamson ether systhesis for tert-butyl methyl ether is

asked Feb 25, 2014 by sreemathi.v

1 answer

A cylinder container with the moveable piston initially hold 3.0 mole of a gas at 8.0 atm pressure and a volume of 5.0 litre. If piston is moved to create a volume 10.0 litre , while simultaneously with drawing 1.5 mole of gas. Calculate the final pressure.

asked Feb 23, 2014 by sharmaaparna1

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 entropy (s) accompanying this reaction,at 298K?

asked Feb 18, 2014 by sreemathi.v

1 answer

An azeotropic solution of two liquids has a boiling point lower than either of them when it

asked Feb 14, 2014 by sreemathi.v

2 answers

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

asked Feb 7, 2014 by sreemathi.v

1 answer

Find the solution : $ (1+x^4) \large\frac{dy}{dx}$$-4x^3y =(x^5+x) \tan ^{-1} (x^2) \qquad y(1)=\pi$

asked Feb 6, 2014 by meena.p

1 answer

Three NAND gates are connected as shown in circuit. The logic operation corresponds to

asked Jan 30, 2014 by meena.p

1 answer

The 70th percentile is equal to

asked Jan 28, 2014 by thanvigandhi_1

1 answer

Which of the following salts does not form any ppt with excess of NaOH ?

asked Jan 28, 2014 by sreemathi.v

1 answer

Hydrolith a source of hydrogen is

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 $y$ in the equation is

asked Jan 21, 2014 by sreemathi.v

1 answer

The electronic configuration of an element is $1s^2,2s^22p^6,3s^23p^63d^5,4s^1$.This represents its

asked Jan 15, 2014 by sreemathi.v

1 answer

The value of $k$ for which the line $\large\frac{x-4}{1}=\frac{y-2}{1}=\frac{z-k}{2}$ to lie on the plane $2x-4y+3z=6$ is ?

asked Jan 6, 2014 by rvidyagovindarajan_1

1 answer

Find the sum of 8 terms of the series whose $n^{th}$ term is given by $n^2+2^n$

asked Jan 6, 2014 by yamini.v

1 answer

The value of $\lim\limits_{x\to 0}\int\limits_{0^{x^2}}\large\frac{\cos t^2dt}{x\sin x}$ is

asked Dec 30, 2013 by sreemathi.v

1 answer

Integrate : $\sqrt { \bigg( \large\frac{1+ \sin 2x}{1+ \cos 2x}\bigg)}$$dx$

asked Dec 18, 2013 by meena.p

1 answer

On the basis of the following $E^{\circ}$ values, the strongest oxidizing agent is :$[Fe(CN_6)]^{4-} \rightarrow [Fe(CN_6)]^{3-} +e^{-1} ; E^{\circ}= -0.35V \: \: \:$ $ Fe^{2+} \rightarrow Fe^{3+} + e^{-1} ; E^{\circ} = -0.77 V$

asked Dec 17, 2013 by thanvigandhi_1

0 answers

" M " cells ( Mesoblast cells ) play an important role in the development of which body cavity :

asked Dec 9, 2013 by thanvigandhi_1

1 answer

Increase in capillary permeability is induced by

asked Dec 5, 2013 by thanvigandhi_1

0 answers

If $\overrightarrow a,\:\overrightarrow b,\:\overrightarrow c$ are any three vectors such that $\overrightarrow a\times\overrightarrow b=\overrightarrow c\:\:and\:\:\overrightarrow b\times\overrightarrow c=\overrightarrow a$, then the magnitude of $\overrightarrow b$ is?

asked Dec 5, 2013 by rvidyagovindarajan_1

1 answer

The empirical formulae for zeolites

asked Nov 29, 2013 by sreemathi.v

1 answer

Which of the following mixtures will act as a buffer solution when dissolved in 50 mL of water?

asked Nov 27, 2013 by mosymeow_1

1 answer

The number of genotypes in Mendelian dihybrid cross is :

asked Nov 26, 2013 by thanvigandhi_1

0 answers

Statement (S) : The concept of survival of the fittest is central to natural selection. Reasons (R) : Individuals who possess advantageous characters to adapt to the environment have better potential for survival.

asked Nov 15, 2013 by thanvigandhi_1

0 answers

The area (in square units) bonded by the curves $y^2=4x$ and $x^2=4y$ in the plane is :

asked Nov 13, 2013 by meena.p

1 answer

$\int \limits_0^{\pi/2} \large\frac{dx}{1+ \tan^3 x}$ is equal to :

asked Nov 7, 2013 by meena.p

1 answer

In the life-cycle of plasmodium vivax some stages may survive for long periods in liver as dormant stages known as :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Volume of 2m HCl required to neutralize the solution containing 1 mole of $NH_4Cl$ and $1$ mole of NaOH is

asked Oct 29, 2013 by sreemathi.v

1 answer

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