Recent questions tagged q68

The magnetic force depends on $\overrightarrow{v}$ which depends on the inertial frame of reference . Does then the magnetic force differ from inertia frame to frame ?

asked Jul 30, 2015 by meena.p

1 answer

Name any two dia magnetic substance

asked Jul 20, 2015 by meena.p

1 answer

What is the purpose of having a series resistor in the charging circuits?

asked Jul 1, 2015 by meena.p

1 answer

A conducting sphere of radius $10\;cm$ has an unknown charge. If the electric field $20\;cm$ from the center of the sphere is $1.5 \times 19^3 N/C$ points radially inwards , what is the net charge on the sphere.

asked Apr 28, 2015 by meena.p

1 answer

True-or-False :If $\tan A=\large\frac{1-\cos B}{\sin B}$ then $\tan 2A=\tan B$

asked May 20, 2014 by sreemathi.v

1 answer

In $SN_ 2$ reaction, the correct order of reactivity for the following compounds:$CH_3Cl,CH_3CH_2Cl,(CH_3)_2CHCl$ and $(CH_3)_3CCl$ is

asked Apr 7, 2014 by sreemathi.v

1 answer

The cell membranes are mainly composed of

asked Mar 30, 2014 by thanvigandhi_1

1 answer

In an irreversible process taking place at constant $T$ and $p$ and in which only pressure-volume work is being done, the change in Gibbs free energy $(dG)$ and change in entropy $(dS)$, satisfy the criteria

asked Mar 18, 2014 by thanvigandhi_1

1 answer

Before introducing $FeO$ in blast furnace , it is converted to $Fe_2O_3$ by roasting so that

asked Mar 18, 2014 by meena.p

2 answers

Depending upon intermolecular forces polymes are classified into

asked Mar 12, 2014 by thanvigandhi_1

1 answer

Which of the following is the correct order of bond angle

asked Mar 7, 2014 by sreemathi.v

1 answer

Find the average energy stored in a 60 cm length of a laser beam operating at $4\: mW.$

asked Mar 1, 2014 by thanvigandhi_1

1 answer

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

asked Feb 25, 2014 by meena.p

1 answer

In the below reaction :The product X is

asked Feb 24, 2014 by sreemathi.v

1 answer

A vessel of volume 5 litre contains 1.4g of nitrogen at temperature 1800K. Find the pressure of the gas if $30\%$ of its molecules are dissociated into atoms at this temperature.

asked Feb 20, 2014 by sharmaaparna1

1 answer

The passage of a constant current through a dilute solution of sulfuric acid with platinum electrodes,for the resulted in liberation of 336ml of mixed hydrogen and oxygen ,reduced to S.T.P.Then the strength of current is

asked Feb 17, 2014 by sreemathi.v

1 answer

Which is true about ideal solutions?

asked Feb 14, 2014 by sreemathi.v

1 answer

Find solution : $\large\frac{dy}{dx} $$= 1+ \sqrt {y-x+3}$

asked Feb 6, 2014 by meena.p

1 answer

A ellipse is the locus of a point which moves in a plane such that its distance from a fixed point (i.e focus) is a constant ratio from a _____________

asked Feb 6, 2014 by sreemathi.v

1 answer

(Crystal Field Theory) Consider the complex ion $[Mn(OH_2)_6]^{2+}$ with 5 unpaired electrons. Which response includes all the following statements that are true, and no false statements?

asked Feb 3, 2014 by sreemathi.v

1 answer

Which is most reactive metal

asked Jan 30, 2014 by sreemathi.v

1 answer

The Output Y of the figure is :

asked Jan 30, 2014 by meena.p

1 answer

The salt which gives crimson red colour in flame test is

asked Jan 28, 2014 by sreemathi.v

1 answer

A group of 10 items has mean 6. If mean of 4 of these items is 7.5 the mean of remaining items is

asked Jan 26, 2014 by thanvigandhi_1

1 answer

What is the oxidation state of Fe in the product formed when acidified pottasium ferrocyanide treated with $H_2O_2$?

asked Jan 24, 2014 by sreemathi.v

1 answer

The loss or reduction of chlorophyl in leaves is termed as

asked Jan 21, 2014 by sreemathi.v

1 answer

In an atom,an electron is moving with a speed of 600m/s with an accuracy of 0.005%.Certainly with which the position of the electron can be located is ($h=6.6\times 10^{-34}kg)m^2s^{-1}$.mass of electron,$e_m=9.1\times 10^{-31}kg)$

asked Jan 13, 2014 by sreemathi.v

1 answer

How many 3 digit numbers are divisible by 5?

asked Jan 5, 2014 by yamini.v

1 answer

A line passes through the points with position vectors are $\hat i+\hat j-2\hat k$ and $\hat i-3\hat j+\hat k$. The position vector of a point on the line which is at a unit distance from the first point is ?

asked Jan 5, 2014 by rvidyagovindarajan_1

1 answer

$\lim\limits_{x\to a}\large\frac{\log(x-a)}{\log(e^x-e^a)}$ is

asked Dec 24, 2013 by sreemathi.v

1 answer

$I_n =\int \limits_0^{z/4} \tan ^n x \;dx$ find $I_{n-1}+I_{n+1}$

asked Dec 17, 2013 by meena.p

1 answer

The dissociation equilibrium of a gas $AB_2$ can be represented as :$2AB_2(g) \leftrightharpoons 2 \: AB (g) +B_2(g)$ The degree of dissociation is 'x' and is small compared to 1. The expression relating the degree of dissociation (x) with equilibrium constant $K_p$ and total pressure P is :

asked Dec 17, 2013 by thanvigandhi_1

0 answers

Separation of sick and non productive birds from healthy and productive birds is known as :

asked Dec 9, 2013 by thanvigandhi_1

0 answers

In poultry " broiler finish mash " is fed to the chicks between

asked Dec 5, 2013 by thanvigandhi_1

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If the sum of two unit vectors is a unit vector, then the magnitude of their difference is ?

asked Nov 30, 2013 by rvidyagovindarajan_1

1 answer

When $B_2H_6$ reacts with $H_2O$ or alkalies and produces $x+y$ is liberated.The $x$ is

asked Nov 28, 2013 by sreemathi.v

1 answer

$pK_{a1}, pK_{a2}$ and $pK_{a3}$ of $H_3PO_4$ are respectively x, y and z. $pH$ of 0.1 M $Na_2HPO_4$ solution is

asked Nov 27, 2013 by mosymeow_1

1 answer

The number of occipital condyles in mammals is :

asked Nov 26, 2013 by thanvigandhi_1

0 answers

Match vertebral number and the corresponding region in rabbit :

asked Nov 14, 2013 by thanvigandhi_1

0 answers

The radius of a circular plate is increasing at the rate of $0.01\;cm/sec$ when the radius is $12\; cm$. Then the rate at which the area increases, is :

asked Nov 13, 2013 by meena.p

1 answer

In the interval $(-3,3)$ the function $f(x) =\large\frac{x}{3}+\frac{3}{x}$$x \neq 0$ is :

asked Nov 6, 2013 by meena.p

1 answer

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