Recent questions tagged q112

If P is the pressure of gas, then the kinetic energy per unit volume of the gas is

asked Mar 2, 2014 by sharmaaparna1

1 answer

The statement which are correct regarding benzene are : (i) It has $12 \sigma$ and $3 \pi$ bonds. (ii) There is delocalisation of $\pi$ - electrons. (c) $C-C$ bond distance is $1.39 A^{\circ}$ . (d) $C-C$ bond distance is $1.39 A^{\circ}$ and $1.54\;A^{\circ}$ alternatively .

asked Feb 28, 2014 by meena.p

1 answer

Which one of the following reagents is used in the below reaction?

asked Feb 26, 2014 by sreemathi.v

1 answer

For what value of $\lambda$ does the line $y=2x+\lambda$ touches the hyperbola $16x^2-9y^2=144$?

asked Feb 10, 2014 by sreemathi.v

1 answer

Sum of series $\;\sum_{r=1}^{n}\;r\;log\;\frac{r+1}{r}$ is :

asked Jan 20, 2014 by yamini.v

1 answer

The angular momentum of an electron in a Bohr's orbit of H-atom is $4.2178\times 10^{-34}Kg-m^2/s$.Calculate the spectral line emitted when electron falls from this level to next lower level.

asked Jan 16, 2014 by sreemathi.v

1 answer

If $\overrightarrow a,\overrightarrow b$ are mutually $\perp$ unit vectors and the vectors $x\overrightarrow a+x\overrightarrow b+z(\overrightarrow a\times\overrightarrow b ),\:\:\overrightarrow a+(\overrightarrow a\times\overrightarrow b),\:\:and\:\:z\overrightarrow a+z\overrightarrow b+y(\overrightarrow a\times\overrightarrow b)$ lie in a plane then $Z$ is ?

asked Jan 6, 2014 by rvidyagovindarajan_1

1 answer

If $f$ is a real valued differentiable function satisfying $\mid f(x)-f(y)\mid\leq (x-y)^2,x,y\in R$ and $f(0)=0$ then $f(1)$ equals

asked Dec 31, 2013 by sreemathi.v

1 answer

Integrate : $\int \log (\sin x ) \cos x dx$

asked Dec 19, 2013 by meena.p

1 answer

A competitive inhibitor of succinic dehydrogenase is :

asked Dec 18, 2013 by thanvigandhi_1

0 answers

The current voltage graph for a given metallic wire at two different temperatures $T_1\: and \: T_2$ is shown in the figure. The temperature $T_1\: and \: T_2$ are related as :

asked Nov 18, 2013 by thanvigandhi_1

1 answer

A battery of emf 'E' and internal resistance 'r' is connected to a resistor of resistance $'r_1'$ and Q Joules of heat is produced in a certain time 't'. When the same battery is connected to another resistor of resistance $'r_2'$ the same quantity of heat is produced in the same time 't'. Then, the value of 'r' is :

asked Nov 2, 2013 by thanvigandhi_1

1 answer

For a transistor to work as an amplifier

asked Oct 20, 2013 by thanvigandhi_1

1 answer

When a battery connected across a resistor of $416 \Omega$, the voltage across the resistor is 12 V. When the same battery is connected across a resistor of $10 \Omega$, Voltage across it is 11V. The internal resistance of the battery in Ohms is

asked Oct 20, 2013 by meena.p

1 answer

An infinitely long straight conductor is bent into the shape as shown below. It carries a current of i Amps, and the circular loop is R meters. Then the magnitude of magnetic induction at the center of the circular loop is :

asked Oct 14, 2013 by meena.p

1 answer

A pnp transistor is used in common emitter mode in an amplifier circuit. When base current is changed by an amount $ \Delta I_B$, the collector current changes by 4 mA. If the current amplification factor is 60, then the value of $ \Delta I_B$ is

asked Oct 12, 2013 by thanvigandhi_1

1 answer

Charge passing through a conductor of cross -section area $A=0.3 m^2$ is given by $q=3t^2+5t+2$ in coulombs, where 't't is in seconds. What is the value of drift velocity at $t=2$ sec. Given $n= 2 \times 10^{25}/mn^3$:

asked Sep 30, 2013 by meena.p

1 answer

Some physical quantities are given in the List I and the related units are given in the List II.Match the correct pairs in the list:

asked Sep 24, 2013 by meena.p

1 answer

The ends of an element of zinc are kept at a small temperature difference $ \Delta T$ and a small current (I) is passed through the wire. Then, the heat developed per unit time

asked Sep 18, 2013 by meena.p

1 answer

$p\leftrightarrow q$ is equivalent to

asked May 24, 2013 by poojasapani_1

1 answer

The product of the perpendiculars drawn from the point $(8 ,0)$ on the hyperbola to its asymptotes is $\large\frac{x^{2}}{64}-\frac{y^{2}}{36}=$$1$ is

asked May 14, 2013 by poojasapani_1

1 answer

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