Recent questions tagged medium

The following figure has two NOT gates and a NOR. What does it represent?

asked Jan 29, 2014 by meena.p

1 answer

How many NAND gates are used to form an AND gate

asked Jan 29, 2014 by meena.p

1 answer

Truth table given below represents

asked Jan 28, 2014 by meena.p

1 answer

WHich of the following best describes the output of a full wave rectifier:

asked Jan 28, 2014 by meena.p

1 answer

The emitter current in a transistor is $ 1mA$ If $\alpha =0.95$ value of base current is :

asked Jan 28, 2014 by meena.p

1 answer

The two lines of regression are $ x+2y-5=0$ and $ x+3y-8=0$. The coefficient of correlation between $x$ and $y$ is

asked Jan 28, 2014 by thanvigandhi_1

1 answer

In a p-n function diode a input signal is applied as shown. The output across $R_L$ is

asked Jan 28, 2014 by meena.p

1 answer

The coefficient of correlation between $x$ and $y$ is $0.5$ and their covariance is $16$ and SD of $x$ is $4$ then SD of $y$ is

asked Jan 28, 2014 by thanvigandhi_1

1 answer

If $A=\begin{bmatrix}2 & sec^{-1}x\\-1 & cosec^{-1} x \end{bmatrix}$ is a singular matrix then find the value of $x$

asked Jan 28, 2014 by rvidyagovindarajan_1

1 answer

For 12 pair of observation on $x$ and $y$ the $r$ calculated is $0.674$. The standard error is

asked Jan 28, 2014 by thanvigandhi_1

1 answer

If in a moderately skewed distribution the value of mode and mean are $ 6 \lambda \: and \: 9 \lambda$ respectively, then value of median is

asked Jan 28, 2014 by thanvigandhi_1

1 answer

Find the value of $\tan({\frac{1}{2}}\sin^{-1}{\frac{1}{4}})$

asked Jan 28, 2014 by rvidyagovindarajan_1

1 answer

The energy density of an ideal monoatomic gas is equal to:

asked Jan 28, 2014 by balaji.thirumalai

1 answer

The $x$-components of velocity of some particles (in $km/s$) are $6,4,2,0,-2,-4,-6$. The root-mean-square (rms) velocity calculated from these data (in $km/s$) is nearest to?

asked Jan 28, 2014 by balaji.thirumalai

1 answer

A transistor in common emitted mode the load resistance is $2k \Omega$ and the current gain $\beta =50,$ What is the power if input resistance is $500 \Omega$

asked Jan 28, 2014 by meena.p

1 answer

When negative voltage feedback is applied to an amplifier of gain 150, the overall gain falls to 15. Find the fraction of the output that is feedback to the input.

asked Jan 28, 2014 by meena.p

1 answer

In an amplifier, negative feedback is introduced with feedback fraction $\beta =0.01$. If voltage given with out negative feed back. is $2500$ what is voltage gain with negative feed back.

asked Jan 28, 2014 by meena.p

1 answer

In an n-p-n transistor only $3 \%$ of the charge carriers are allerved to recombine in the base region. The value of $ \alpha$ is

asked Jan 28, 2014 by meena.p

1 answer

The metal which gives brick red colour in flame test is

asked Jan 28, 2014 by sreemathi.v

1 answer

Oxides of alkaline earth metals are stable due to

asked Jan 28, 2014 by sreemathi.v

1 answer

What is the emitter current $I_E$ in a transfer where base current $I_B$ is $20 \mu A$ and $\beta =40$

asked Jan 28, 2014 by meena.p

1 answer

What is the output resistance, When we observe in a common emitter circuit the collector current increase from $9.5 \;mA\;to 10\;mA$ When the collector voltage increase from $2.5 \;to \;6v$ When base current is kept constant .

asked Jan 28, 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

Which of the following metals cannot give flame tests?

asked Jan 28, 2014 by sreemathi.v

1 answer

The electrical conductivity in aqueous solutions is high for

asked Jan 28, 2014 by sreemathi.v

1 answer

Which does not form peroxides?

asked Jan 28, 2014 by sreemathi.v

1 answer

Magnesium burns in air giving two products .Their formulae are

asked Jan 28, 2014 by sreemathi.v

1 answer

Oxygen evolves on heating

asked Jan 28, 2014 by sreemathi.v

1 answer

$BeH_2$ and $MgH_2$ are prepared using the reagent

asked Jan 28, 2014 by sreemathi.v

1 answer

The elements that reacts with cold water

asked Jan 28, 2014 by sreemathi.v

1 answer

The polorising power of $Mg^{2+}$ is nearly same as that of

asked Jan 28, 2014 by sreemathi.v

1 answer

Which of the following is less covalent?

asked Jan 28, 2014 by sreemathi.v

1 answer

Hardening of plaster of paris is because of

asked Jan 28, 2014 by sreemathi.v

1 answer

A compound of Vanadium has a magnetic moment of 1.73 Bm. Work out the electric configuration of the Vanadium ion in the compound.

asked Jan 28, 2014 by sharmaaparna1

1 answer

In a common base amplifier current gain is $0.96$ and emitter current is $7.2\;mA$. The base current is

asked Jan 28, 2014 by meena.p

1 answer

In the hardening stage of plaster of paris,the compound formed is

asked Jan 28, 2014 by sreemathi.v

1 answer

Passivity is exhibited by

asked Jan 28, 2014 by sreemathi.v

1 answer

Which of the following is an alkaline earth?

asked Jan 28, 2014 by sreemathi.v

1 answer

The metal carbonate which decomposes easily on heating is

asked Jan 28, 2014 by sreemathi.v

1 answer

Which of the following has no existance as a solid?

asked Jan 28, 2014 by sreemathi.v

1 answer

The least ionic chloride is given by

asked Jan 28, 2014 by sreemathi.v

1 answer

The alkaline earth metal whose carbonate has no natural occurence is

asked Jan 28, 2014 by sreemathi.v

1 answer

Consider the following reaction $6NaOH+3Cl_2\rightarrow 5NaCl+A+3H_2O$ what is the oxidation number of chlorine in "A"?

asked Jan 28, 2014 by sreemathi.v

1 answer

An electron enters the p-n junction from the n-side with a velocity of $5 \times 10^5 m/s$ . If the depletion region is $5 \times 10^{-7} m/s$ wide and the potential barrier is $0.5 V$ What will be its speed When it enters P side ?

asked Jan 28, 2014 by meena.p

1 answer

An electron losely bound to the impurity of a doped semiconductor is able to jump to the conducting band because of thermal collision at temperature T k. If the impurity level is 15 mev below the conducting band, calculate the temperature.

asked Jan 28, 2014 by meena.p

1 answer

Aqueous solution of $Na_2O_3$ is

asked Jan 28, 2014 by sreemathi.v

1 answer

A mixture of soda ash and pearl ash is known as

asked Jan 28, 2014 by sreemathi.v

1 answer

$Li,Na$ and $K$ burn is excess of air to form

asked Jan 28, 2014 by sreemathi.v

1 answer

$Na$ and $Li$ are burnt in dry air we get

asked Jan 28, 2014 by sreemathi.v

1 answer

Oxone is a compound of

asked Jan 28, 2014 by sreemathi.v

1 answer

Ask Questions, Get Answers