Recent questions tagged medium

Given the $\lambda$ values for violet light ($\lambda=4.10\times 10^{-5}cm)$ and red light($\lambda=6.56\times 10^{-5}cm$), which of the following is true about the ratio of energies carried by them and their frequencies?

asked Jan 9, 2014 by sreemathi.v

1 answer

The correct statement for the phenomenon of "Electrostatic Induction " is :

asked Jan 9, 2014 by meena.p

1 answer

A metal sphere of radius $r_1$ is charged to potential $V_1$ and enclosed in thin spherical shell. If metal sphere is connected to shell by a conductor the potential of shell will be :

asked Jan 8, 2014 by meena.p

1 answer

Equation of the line through the point $(2,-1,-1)$, which is parallel to the plane $4x+y+z+2=0$ ans is $\perp$ to the line $x=\large\frac{y}{-2}=$$z-5$ is ?

asked Jan 8, 2014 by rvidyagovindarajan_1

1 answer

Let A and B be two independent events such that $P(A) = \large\frac{1}{5} \: P( A \cup B ) = \large\frac{7}{10}$. Ten $ P(\overline B)$ is equal to

asked Jan 8, 2014 by thanvigandhi_1

1 answer

Capacitors $C1$ and $C2$ are joined as shown below. If potential at point A i $V_A$ and point B is $V_B$, Potential at point C is

asked Jan 8, 2014 by meena.p

1 answer

A box contains 3 white and 2 red balls. If we draw one ball and without replacing the first ball, the probability of drawing red ball in the second draw is

asked Jan 8, 2014 by thanvigandhi_1

1 answer

The capacitance of capacitors of plate area $A_2 and A_1 (A_2 < A_1) $ at a distance l is

asked Jan 8, 2014 by meena.p

1 answer

The mean and variance of a binomial variate X are 2 and 1 respectively. The probability that X takes a value greater than 1 is

asked Jan 8, 2014 by thanvigandhi_1

1 answer

If electric field $\overrightarrow {E} =( y \hat i + x \hat j ),$ the potential field is

asked Jan 8, 2014 by meena.p

1 answer

Capacitance of capacitor becomes $\large\frac{4}{3}$ times its original value if a dielectric slab of thickness $\large\frac{d}{2}$ is inserted b/w the plates (d= seperation between the plates) . The dielectric constant of the slab is:

asked Jan 8, 2014 by meena.p

1 answer

If two conducting spheres are seperately charged and then brought in contact

asked Jan 8, 2014 by meena.p

1 answer

Charge Q is given displacement $ \overrightarrow {r} = a\hat i + b \hat j $ in electric field $\overrightarrow {E}= E_1 \hat i +E_2 \hat j . $ work done is :

asked Jan 8, 2014 by meena.p

1 answer

If the probability for A to fail in an examination is 0.2 and that for B is 0.3 then the probability that either A or B fails is

asked Jan 8, 2014 by thanvigandhi_1

1 answer

The electric potential V at any point (x,y,z) in space is given by $V= gx^2\; volt$. Electric field at $ (2,0,5) m $ in $Vm^{-1}$ is :

asked Jan 8, 2014 by meena.p

1 answer

In one gram solid, there are $10^{22}$ atoms. If one electron is removed from each one of $0.01 \%$ of atoms the charge gained by solid would be :

asked Jan 8, 2014 by meena.p

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125 drops of water of same radius and same charge combine to form a big drop. Ration of potential of big drop to the potential of small drop.

asked Jan 8, 2014 by meena.p

1 answer

In that below diagram $C_1= 4 \mu F, C_2 =12 \mu F, C_3=8 \mu F$ Energy consumed in charging these capacitors is :

asked Jan 8, 2014 by meena.p

1 answer