Recent questions tagged q73

An electron enters with a velocity $\overrightarrow{v} =v_0 \hat i$ into a cubical region (faces parallel to coordinate plane ) in which there are uniform electric and magnetic fields. The orbit of the electron in front to spiral down inside the cube in plane parallel to the x-y plane . Suggest a configuration of fields $\overrightarrow{E}$ and $\overrightarrow{B}$ that can lead to it.

asked Jul 30, 2015 by meena.p

1 answer

A magnetized needle is placed $30^{\circ}$ with direction of uniform magnetic field of intensity $3 \times 10^{-2}\;T$ The torque acting on the needle is $7.2 \times 10^{-4} \;J$ Calculate the magnetic moment of the needle .

asked Jul 20, 2015 by meena.p

1 answer

A steady current flow in a metallic conductor of non - uniform cross - section which of these quantities is constant along the conductor

asked Jul 2, 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 $cosec x=1+\cot x$ then $x=2n\pi,2n\pi+\large\frac{\pi}{2}$

asked May 20, 2014 by sreemathi.v

1 answer

In the reaction,$CH_3COOH\quad\underrightarrow{LiAlH_4}\quad A\quad\underrightarrow{PCl_5}\quad B\quad\underrightarrow {Alc.KOH}\quad C$,the product C is

asked Apr 7, 2014 by sreemathi.v

1 answer

The correct statement about the following sugars X and Y is

asked Mar 30, 2014 by thanvigandhi_1

1 answer

The metal that is sometimes found native in nature .

asked Mar 20, 2014 by meena.p

1 answer

Estimate the value of $ \Delta S^{\circ}_{298}$ for the dissociation of calcium carbonate given that, $ \Delta H^{\circ}_{298}$ for the reaction is $178\: kJ$. The equilibrium pressure is one bar at $897^{\circ}C.(R = 8.314\: J/Kmol)$

asked Mar 19, 2014 by thanvigandhi_1

1 answer

The presence of which of the following inhibit the free radical polymeisaation of a vinyl derivative?

asked Mar 12, 2014 by thanvigandhi_1

1 answer

Hydrolysis products of $ln C_2$ what is y.

asked Mar 12, 2014 by meena.p

1 answer

In which there is change in the type of hybridisation when

asked Mar 7, 2014 by sreemathi.v

1 answer

The IUPAC name of the compound :$CH_2 =CH-CH(CH_3)_2$

asked Feb 25, 2014 by meena.p

1 answer

Among the following molecules:The increasing order of rate of cannizzaro reaction is

asked Feb 24, 2014 by sreemathi.v

1 answer

A 40 mL of a mixture of $H_2O$ and $O_2$ was placed in a gas burette at $18^{\large\circ}C$ and 1 atm P. A spark was applied so that the form a pure gas had a volume of 10mL at $18^{\large\circ}C$ and 1 atm P . If the remaining gas was $H_2$, what was the initial mole $\%$ of $H_2$ in mixture?

asked Feb 23, 2014 by sharmaaparna1

1 answer

Consider the relation,$2Ag^++Cd\rightarrow 2Ag+Cd^{+2}$ the standard electrode potentials for $Ag^+/Ag$ and $Cd^{+2}/Cd$ couples 0.8V and 0.04V respectively.What is the standard potential for this reaction?

asked Feb 18, 2014 by sreemathi.v

1 answer

Which of the following has maximum freezing point for 1 molal solution, assuming equal ionisation in each case?

asked Feb 14, 2014 by sreemathi.v

1 answer

Find the coordinate of double ordinate for the ellipse $\large\frac{x^2}{a^2}+\large\frac{y^2}{b^2}$$=1$

asked Feb 6, 2014 by sreemathi.v

1 answer

Find the solution : $\large\frac{\sqrt x -2}{\sqrt y -1}$$dy =\large\frac{\sqrt y+1}{\sqrt x +2}$$dx$

asked Feb 6, 2014 by meena.p

1 answer

The output of the circuit across resistor R is

asked Jan 30, 2014 by meena.p

1 answer

The salt used for performing bead test in inorganic qualitative analysis is

asked Jan 28, 2014 by sreemathi.v

1 answer

The measure which takes into account all the data item is

asked Jan 27, 2014 by thanvigandhi_1

1 answer

Which is polymeric hydride?

asked Jan 24, 2014 by sreemathi.v

1 answer

In Nitrogen fixation $N_2\qquad\underrightarrow {Nitrogenase}\qquad x \rightarrow NO_2^-\qquad\underrightarrow{\text{In soil}}\qquad y.$.The x in the equation is

asked Jan 21, 2014 by sreemathi.v

1 answer

The first use of quantum theory to explain the structure of atom was given by

asked Jan 15, 2014 by sreemathi.v

1 answer

The equation of the plane passing through the point $(1,1,1)$ and having direction ratios $b,c,a$ $(a < b < c)$, where $a,b,c$ are prime factors of $2001$ is ?

asked Jan 6, 2014 by rvidyagovindarajan_1

1 answer

Find three numbers in AP whose sum is 33 and the sum of whose squares is 395

asked Jan 6, 2014 by yamini.v

1 answer

$\lim\limits_{\theta \to \Large\frac{\pi}{2}}(\sec\theta-\tan\theta)$=

asked Dec 24, 2013 by sreemathi.v

1 answer

Integrate: $\int \large\frac{(x^3+5x^2-3)}{(x+1)}$$dx$

asked Dec 17, 2013 by meena.p

1 answer

Which of the following complexes exhibits the highest paramagnetic behaviour ?

asked Dec 17, 2013 by thanvigandhi_1

0 answers

The molluscan which is unisexual with a single gonad and veliger larva in its life history is :

asked Dec 9, 2013 by thanvigandhi_1

0 answers

Giant squid belongs to

asked Dec 5, 2013 by thanvigandhi_1

0 answers

If $D\:\:and\:\:E$ are mid points of the side $\overline {AB}\:\:and\:\:\overline {AC}$ of a $\Delta \:ABC$, then $\overrightarrow {BE}+\overrightarrow {DC}=?$

asked Dec 3, 2013 by rvidyagovindarajan_1

1 answer

When $SiO_2$ is beated with C in an electric formula

asked Nov 28, 2013 by sreemathi.v

1 answer

100 mL of $pH$ =6 solution is diluted to 100 mL by water. $pH$ of the solution will increase by

asked Nov 27, 2013 by mosymeow_1

1 answer

The biogenetical law is based on :

asked Nov 26, 2013 by thanvigandhi_1

0 answers

A mother with blood group 'B' type has a child with blood group type 'O' . What is the possibility of the genotypes of that mother and father ?

asked Nov 14, 2013 by thanvigandhi_1

0 answers

$\int \limits_0^{\pi/2} \large\frac{200 \sin x+100 \cos x}{\sin x+\cos x}$$dx$ is equal to :

asked Nov 13, 2013 by meena.p

1 answer

If $\int \large\frac{dx}{x^2+2x+2}$$=f(x) +c,$ then f(x) is equal

asked Nov 7, 2013 by meena.p

1 answer

Identify the following structures which are present in dioptrical region of the ommatidium of cockroach :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

3.0mole NaOH solution has a density of 1.110g/ml.The molarity of the solution is

asked Oct 29, 2013 by sreemathi.v

1 answer

$\int \large \frac{\sin x+ 8 \cos x}{4 \sin x+6 \cos x}$$ dx$ is equal to

asked Oct 28, 2013 by meena.p

1 answer

Ask Questions, Get Answers