Recent questions tagged q64

A cubical region of space is filled with some uniform electric and magnetic fields . An electron enters the cube magnetic fields. An electron enters the cube across one of its faces with velocity $\overrightarrow {v}$ and a position enters via opposite face with velocity - $\overrightarrow v$ At this instant .

asked Jul 30, 2015 by meena.p

1 answer

How does the pole strength of each part of bar magnet change if it is cut into equal piece along its length ?

asked Jul 20, 2015 by meena.p

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In a metre bridge , the balance point is found to be at $39.5\;cm$ from the end A, when the resistor Y is of $12.5 \;ohm$. Determine the resistance of x. Why are the connections between resistors in a metre bridge made of thick copper ships ? What happens if the galvanometer and cell are interchanged at the balanced point of the bridge ? would the galvanometer show any current?

asked Jul 1, 2015 by meena.p

1 answer

Careful measurement of the electric field at the surface of a block box indicates that the net outward flux through the surface of the box is $8.0 \times 10^3 \;N-m^2 /C$.If the net outward flux through the surface of the box were zero, could you conclude that there were no changes inside the $60 x?$ Why or why not ?

asked Apr 27, 2015 by meena.p

1 answer

The number of water of crystallization in Borax is

asked Jul 27, 2014 by thanvigandhi_1

1 answer

In a triangle ABC with $\angle C=90^{\large\circ}$ the equation whose roots are $\tan A$ and $\tan B$ is ___________

asked May 20, 2014 by sreemathi.v

1 answer

Resistance of $0.2\; M$ solution of an electrolyte is $50 \Omega$ . The specific conductance of the solution is $1.4 \;m^{-1}$ . The resistance of $0.5\; M$ solution of the same electrolyte is $280\Omega$ .The molar conductivity of $0.5\;M$ solution of the electrolyte in $S m^2mol^{-1}$ is :

asked Apr 7, 2014 by sreemathi.v

1 answer

The enzyme which hydrolyses triglycerides to fatty acids and glycerol is called

asked Mar 29, 2014 by thanvigandhi_1

1 answer

An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system If $T_i$ is the initial temperature and $T_f$ is the final temperature, which of the following statements is correct?

asked Mar 18, 2014 by thanvigandhi_1

1 answer

Silver containing lead as an impurity is removed by

asked Mar 18, 2014 by meena.p

1 answer

Which of the following statements is not correct

asked Mar 12, 2014 by thanvigandhi_1

1 answer

The lone pair of electron is located in $XeF_6$ geometry is

asked Mar 6, 2014 by sreemathi.v

1 answer

Select the final product of the following sequence of reaction:

asked Mar 4, 2014 by sreemathi.v

1 answer

The magnetic field in a plane electromagnetic wave is given by $B = 100\mu T \sin [(2 \times10^{15}s^{-1}) (t-x/c)]$. Calculate the average energy density corresponding to the electric field.

asked Mar 1, 2014 by thanvigandhi_1

1 answer

The correct statements about the compound given below is (are) (i) The compound is optically active. (ii) The compound possesses centre of symmetry (iii) The compound possesses plane of symmetry (iv) The compound possesses axis symmetry.

asked Feb 25, 2014 by meena.p

1 answer

What would be the product of the following reaction?

asked Feb 24, 2014 by sreemathi.v

1 answer

1.47 litre of a gas is collected over water at $30^{\large\circ}C$ and 744mm of Hg . If the gas weight 1.98g and vapour pressure of water at $30^{\large\circ}C$ is 32mm , What is the molecular weight of gas?

asked Feb 20, 2014 by sharmaaparna1

1 answer

A solution of a salt of a metal of atomic weight $'\lambda'$ was electrolysed for 150minutes with 0.15A of current .The weight of metal deposited was 0.783g.Find X,the specific heat of metal=0.057Cal/$g^{\large\circ}C$.According to Dulong-Petit's law,approximate atomic weight of a metal $X$ specific heat=6.4

asked Feb 17, 2014 by sreemathi.v

1 answer

Determine functions $y= 2e^{-x}+ 3e^{2x}$ is solution to which of following differential equation

asked Feb 6, 2014 by meena.p

1 answer

Find the area of triangle inscribed in the parabola $y^2=4ax$ with vertices $(x_1,y_1),(x_2,y_2)$ & $(x_3,y_3)$?

asked Feb 6, 2014 by sreemathi.v

1 answer

The coordination complex, $[Cu(OH_2)_6]^{2+}$ has one unpaired electron. Which of the following statements are true?

asked Feb 3, 2014 by sreemathi.v

1 answer

The equivalent weight of potassium permanganate for acid solution is

asked Jan 30, 2014 by sreemathi.v

1 answer

Which of the gate is represented by

asked Jan 29, 2014 by meena.p

1 answer

Magnesium burns in air giving two products .Their formulae are

asked Jan 28, 2014 by sreemathi.v

1 answer

Mode of the data : \[\] 5, 7, 2, 7, 7, 4, 7, 7, 6, 7 is

asked Jan 25, 2014 by thanvigandhi_1

1 answer

The formula of pertitanic acid is

asked Jan 24, 2014 by sreemathi.v

1 answer

Carcinogens which can cause

asked Jan 21, 2014 by sreemathi.v

1 answer

Which one of the following sets of ions represents a collection of isoelectronic species?

asked Jan 13, 2014 by sreemathi.v

1 answer

The equation of the plane having intercepts of $3$ and $4$ with $x$ and $z$ axes respectively and parallel to $y$ axis is ?

asked Jan 4, 2014 by rvidyagovindarajan_1

1 answer

The $n^{th}$ term of a progression is $2n+3$. What is the type of progression and what is its $15^{th}$ term.

asked Jan 4, 2014 by yamini.v

1 answer

If $f(x)=\left\{\begin{array}{1 1}\large\frac{\sin[x]}{[x]}&[x]\neq 0\\0&[x]=0\end{array}\right.$ then

asked Dec 24, 2013 by sreemathi.v

1 answer

$\int \limits _0^{\omega} \large\frac{x^2}{(x^2+a^2) (x^2+b^2) (x^2+c^2)}$$dx= \large\frac{\pi}{2(a+b)(b+c)(c+a)}$ then find $\int \limits _0^{\omega} \large\frac{dx}{(x^2+4)(x^2+g)}$

asked Dec 17, 2013 by meena.p

1 answer

If the concentration of $OH^-$ ions in the reaction $ Fe(OH)_3 (s) \leftrightharpoons Fe^{3+}(aq)+3\: OH^-(aq) $ is decreased by $ \large\frac{1}{4}$ times, then equilibrium concentration of $ Fe^{3+}$ will increase by :

asked Dec 16, 2013 by thanvigandhi_1

0 answers

An example for *** influenced ihneritance

asked Dec 9, 2013 by thanvigandhi_1

0 answers

The $F_1$ test cross ratio is

asked Dec 5, 2013 by thanvigandhi_1

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For any vector $\overrightarrow a\:\:and\:\:\overrightarrow b$ the angle between $|\overrightarrow a|\overrightarrow b+|\overrightarrow b|\overrightarrow a$ and $|\overrightarrow a|\overrightarrow b-|\overrightarrow b|\overrightarrow a$ is ?

asked Nov 29, 2013 by rvidyagovindarajan_1

1 answer

$CoSO_4+B_2O_3\rightarrow$(Bead).From this equation the Bead is

asked Nov 28, 2013 by sreemathi.v

1 answer

$K_a$ for HCN is $5 \times 10^{-10}$ at $25^\circ C$. How much volume of 5 M KCN solution is required to be added to 10 mL of 2 M HCN in order to maintain $pH$ = 9

asked Nov 27, 2013 by mosymeow_1

1 answer

The extinct amphibian is :

asked Nov 26, 2013 by thanvigandhi_1

0 answers

Number of oxygen molecules bound in a saturated haemoglobin molecule :

asked Nov 14, 2013 by thanvigandhi_1

0 answers

Observe the following statements: $I. f(x) =ax^{41}+bx^{-40}=> \large\frac{f''(x)}{f(x)}$$=1640\;x^{-2} \quad II. \large\frac{d}{dx} $$\tan ^{-1} \bigg(\large\frac{2x}{1-x^2}\bigg)=\frac{1}{1+x^2}$Which of the following is correct ?

asked Nov 13, 2013 by meena.p

1 answer

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