Recent questions tagged q96

A galvanometer with a coil resistance $12 \Omega$ shows a full scale deflection for a current $2.5\;mA$ How will you convert it into a voltmeter of range $7.5 \;V$ Also find the total resistance of Voltmeter formed ?

asked Aug 5, 2015 by meena.p

1 answer

Iso gonic lines are the lines joining places of ____________

asked Jul 22, 2015 by meena.p

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Wire is bent in a circle of radius $10\;cm$ It is given a change on it uniformly. What is the electric potential at the center ?

asked Jul 8, 2015 by meena.p

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Determine the current though the battery of internal resistance $0.5 \Omega$ for the circuit as shown in the figure. How much power is distributed in $6 \Omega$ resistance ?

asked Jul 8, 2015 by meena.p

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Biuret test is not given by

asked Mar 31, 2014 by thanvigandhi_1

1 answer

S1: Absolute values of H and E cannot be determined.\[\] S2: Both H and E are state functions.

asked Mar 20, 2014 by thanvigandhi_1

1 answer

The Impurities present in bauxite are

asked Mar 20, 2014 by meena.p

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Oxidation state of central metal atom in $[CO(NH_3)_5Cl]^{2+}$

asked Mar 13, 2014 by meena.p

1 answer

On heating ( with the below diagram ) with buta 1,3 diene results in the formation of

asked Mar 12, 2014 by thanvigandhi_1

1 answer

The shape of methyl cation $(CH_3)^+$ is

asked Mar 7, 2014 by sreemathi.v

1 answer

According to electromagnetic wave theory, the electric and magnetic field vector associated with the wave is given by \[\] $|E| = E_{max} \cos(kx – \omega t)$ \[\] $|B| = B_{max} \cos(kx – \omega t)$ \[\] The energy of electromagnetic wave is confined in the form of electric and magnetic fields. The energy per unit volume in an electric field is given by $U_E = \large\frac{1}{2} \in_oE^2$ and the energy per unit volume in a magnetic field is given by $ U_M =\large\frac{1}{2} B^2/ \mu_0$ . The energy density associated with the magnetic field is equal to the energy density associated with the electric field. The total energy is equally shared by the electromagnetic as well as magnetic field. The rate of flow of energy in an electromagnetic wave is defined as pointing vector $S = 1/\mu_o (E \times B)$. A plane electromagnetic wave varies sinusoidally at $90\: MHz $ as it travels along the $+ve\: x$ direction. The peak value of the electric field is $2\: millivolt/m$ and it is directed along $ \pm y$ direction \[\] The average energy density in the radiation is

asked Mar 5, 2014 by thanvigandhi_1

1 answer

Optical and isomers are compounds which contain the same number and kinds of atoms, and bonds (ie the connectivity between atoms is the same), and different spatial arrangements of the atoms, but which have non-super imposable mirror images. Each non-super imposable mirror image structure is called an enantiomer. Optical isomers get their name because the plane – polarized light that is passed through a sample of a pure enantiomers is rotated. The planeis rotated in the opposite direction but with the same magnitude when plane- polarized light is passed through a pure sample containing the other enantiomer of a pair. A solution of one enantiomer rotates the plane of polrisation in a clockwise direction. This enantiomer is known as the (+) form. A solution of the other enantiomer rotales the plane of polarisation in an anti-clockwise direction. This enantiomer is known as (-) form.

asked Feb 27, 2014 by meena.p

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Which of the following compound observed in the mechanism of Beckmann rearrangement of the below

asked Feb 26, 2014 by sreemathi.v

1 answer

How much $CaCO_3$ is present in 100ml of 1000ppm $CaCO_3$ solution?

asked Feb 14, 2014 by sreemathi.v

1 answer

1000 mL of aqueous solutions of $CaCO_3$ contains 1 gm of carbonate,concentration of the solution is

asked Feb 14, 2014 by sreemathi.v

1 answer

$HNO_3$ used as a reagent has specific gravity of $1.42 mL^{-1}$ and contains $70\%$ by strength $HNO_3$. Calculate Normality of acid

asked Feb 11, 2014 by sharmaaparna1

1 answer

Solve : $2e^{\Large\frac{x}{y}}(dx-dy)+dx-2e^{\Large\frac{x}{y}} \large\frac{x}{y}$$dy=0$

asked Feb 7, 2014 by meena.p

1 answer

Find the locus of mid-points of the portions of the tangents to the ellipse $\large\frac{x^2}{a^2}+\frac{y^2}{b^2}$$=1$ intercepted between the axis?

asked Feb 7, 2014 by sreemathi.v

1 answer

The graph given below represents the I-V characteristics of a zener diode. Which part of the curve is relevant for operation as voltage regulator?

asked Jan 31, 2014 by meena.p

1 answer

Alkaline earth metal(s) which does(do) not impact colour to the flame is(are)

asked Jan 29, 2014 by sreemathi.v

1 answer

Reducing nature of $H_2O_2:H_2O_2\rightarrow x+y+z$. $z$ is

asked Jan 24, 2014 by sreemathi.v

1 answer

$CF_2Cl_2+hv\rightarrow CF_2Cl+A,CFCl_3+hv\rightarrow CFCl_2+B$.Both $A$ and $B$ are same

asked Jan 22, 2014 by sreemathi.v

1 answer

Sum of series $1^2$-$2^2$+$3^2$-$4^2$+$5^2$+.....+$1001^2$ is

asked Jan 20, 2014 by yamini.v

1 answer

Calculate the wavelength of moving electron having $4.55\times 10^{-25}$Joule of kinetic energy

asked Jan 15, 2014 by sreemathi.v

1 answer

The cosine of angle between the medians drawn from vertices of isosceles rt. angled triangle is?

asked Jan 12, 2014 by rvidyagovindarajan_1

1 answer

If $f(x)=\large\frac{1}{1-x}$,find the points of discontinuity of the composite function $y=f(f(f(x)))$

asked Dec 30, 2013 by sreemathi.v

1 answer

integrate : $\int \sec^3 x dx$

asked Dec 19, 2013 by meena.p

1 answer

In a $S_N2$ substitution reaction of the type $ R-B+CI^- \underrightarrow {DMF} R-CI+Br^+,$ which one of the following has the highest reactivity rate :

asked Dec 18, 2013 by thanvigandhi_1

0 answers

The area where wild populations traditional lifestyles and genetic resources as protected is :

asked Dec 11, 2013 by thanvigandhi_1

1 answer

If a person standing at the point $(1,2) $ walks $5$ units towards east, then $3$ units towards north and $\sqrt 2$ units along the direction of $\hat i+\hat j$ and then walks $\sqrt 2 $ unit along the direction $\perp$ to this vector towards the starting point. What is the displacement of the person from origin?

asked Dec 9, 2013 by rvidyagovindarajan_1

1 answer

In the pond ecosystem, rooted plants occur in

asked Dec 5, 2013 by thanvigandhi_1

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Silica is eliminated during the process as:

asked Nov 29, 2013 by sreemathi.v

1 answer

$H_3BO_3$ is

asked Nov 27, 2013 by mosymeow_1

2 answers

The pentamerous symmetry is found in :

asked Nov 27, 2013 by thanvigandhi_1

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An ideal gas is initially at temperature T and volume V. Its volume is increased by $ \Delta V$ due to an increase in temperature $ \Delta T$ , pressure remaining constant. The physical quantity $ \delta = \large\frac{\Delta V}{V \Delta T}$ varies with temperature as :

asked Nov 17, 2013 by thanvigandhi_1

1 answer

The sides of a $\Delta$le are respectively 7cm,$4\sqrt 3$cm and $\sqrt{13}$cm then the smallest angle of the triangle is

asked Nov 15, 2013 by sreemathi.v

1 answer

A uniform metal disc of diameter 24 cm is taken and out of it a disc of diameter 8 cm is cut off from the right side end. The centre of mass of the remaining part will be at :

asked Nov 2, 2013 by thanvigandhi_1

1 answer

Calculate molality of 1L solution of 93% $H_2SO_4$ by volume .The density of solution is 1.84g/ml

asked Oct 31, 2013 by sreemathi.v

1 answer

When a metallic wire is stretched with a tension $T_1$ its length is $l_1$ and with a tension $T_2$ its length is $l_2$. The original length of the wire is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

One litre of oxygen at a pressure of 1 atm. and two litres of nitrogen at a pressure of $0.5\;atm.$ are introduced into a vessel of volume 1 litre. If there is no change in temperature, the final pressure of the mixture of gas (in atm) is

asked Oct 18, 2013 by meena.p

1 answer

Two cylinders 'A'and 'B' fitted with pistons contain equal number of moles of an ideal mono-atomic gas at $400\;K$. The piston of 'A' is free to move while that of 'B' is held fixed. Same amount of heat energy is given to the gas in each cylinder. If the rise in temperature of the gas in 'B' is :

asked Oct 11, 2013 by meena.p

0 answers

Three particles, each of mass m are placed at the vertices of a right angled triangle as shown in figure. The position vector of the centre of mass of the system is ( O is the origin and $ \overrightarrow i , \overrightarrow j, \overrightarrow k $ are unit vectors )

asked Oct 9, 2013 by thanvigandhi_1

1 answer

A bimetallic strip is formed out of two identical strips, One of copper and the other of brass. The coefficients of linear expansion of the two metals are $ \alpha _C$ and $\alpha_{B}.$ On heating, the temperature of the strips increases by $\Delta T$ and the strip bend to from an arc of radius R. Then R is proportional to :

asked Sep 30, 2013 by meena.p

1 answer

A simple harmonic oscillator consists of a particle of mass $'m'$ and an ideal spring with spring constant $'k'$. The particle oscillates with a time period 'T'. The spring is cut into two equal parts. If one part oscillates with the same particle , the time period will be :

asked Sep 24, 2013 by meena.p

1 answer

A glass flask of volume one liter is filled completely with mercury at $0^{\circ}C$. Then flask is now heated to $100 ^{\circ} C.$ Coefficient of volume expansion of mercury is $1.82 \times 10^{-4} /^{\circ} C$ and coefficient of linear expansion of glass is $0.1 \times 10^{-4}/^{\circ} C$. During this process, amount of mercury which overflows is

asked Sep 17, 2013 by meena.p

1 answer

If the angular velocity of a planet about its own axis is halved, the distance of geostationary satellite of this planet from the center of the planet will become

asked Aug 30, 2013 by meena.p

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A spring 40 mm long is streched by application of a force. If 10 N force is required to stretch the spring through 1 mm, then work done in stretching the spring through 40 mm is

asked Aug 8, 2013 by meena.p

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