Class 12th

The correct order of acid character of the following compounds is

0 Follower 7 Views

Class 12th Electromagnetic Induction

Contributor-Level 10

Acidic order

0 0

New answer posted

a year ago

A coil of inductance 2H having negligible resistance is connected to a source of supply whose voltage is given by V = 3t volt. (where t is in second). If the voltage is applied when t = 0, the energy stored in the coil after 4s is…………… J.

0 Follower 3 Views

Contributor-Level 10

$L \frac{d i}{d t} = V \Rightarrow 2 d i = 3 t d t \Rightarrow 2 \int_{0}^{i} d i = 3 \int_{0}^{4} t d t \Rightarrow i = 12 A$
$U = \frac{1}{2} L i^{2} = \frac{1}{2} * 2 * 1 2^{2} = 144 J$

0 0

New answer posted

a year ago

Class 12th Physics

512 identical drops of mercury are charged to a potential of 2V each. The drops are joined to form a single drop. The potential of this drop is ……………. V.

0 Follower 4 Views

Contributor-Level 10

Let the charge of on each drop be q and radius of each drop be r.

$\frac{k q}{r} = 2$

When all drops are joined, radius,

$r' = {(512)}^{\frac{1}{3}} r = 8 r$

Potential of the new drop,

$V = \frac{k . 512 q}{8 r} = 64 \frac{k q}{r} = 128 V$

0 0

New answer posted

a year ago

The major product of the following reaction is

0 Follower 4 Views

Contributor-Level 10

Acidic order

Simple concept of conjugate base stability

0 0

New answer posted

a year ago

Class 12th Physics

A transmitting station releases waves of wavelength 960m. A capacitor of 2.56 $μ F$ is used in the resonant circuit. The self inductance of coil necessary for resonance is……………. * 10^-8 H.

0 Follower 3 Views

Contributor-Level 10

2 π f $\frac{1}{\sqrt[]{L C}} \Rightarrow L = \frac{λ^{2}}{4 π^{2} C c^{2}} = \frac{96 0^{2}}{4 * 3.1 4^{2} * 2.56 * 1 0^{- 6} * 9 * 1 0^{16}}$ =10^-7 = 10 * 10^-8 H

0 0

New answer posted

a year ago

The major components of German Silver are

0 Follower 4 Views

Contributor-Level 10

Cu, Zn, Ni

Composition of german silver [Cu-50%, Zn-20%, Zi-30%]

0 0

New answer posted

a year ago

Class 12th Physics

In the given circuit of potentiometer, the potential difference E across AB (10m length) is larger than E₁ and E₂ as well. For key K₁(closed), the jokey is adjusted to touch the wire at point J₁ so that there is no deflection in the galvanometer. Now the first battery (E₁) is replaced by second battery (E₂) for working by making K₁ open and K₂ closed. The galvanometer gives then null deflection at J₂. The value of $\frac{E_{1}}{E_{2}} i s \frac{a}{b},$ where a = …………….

0 Follower 5 Views

Contributor-Level 10

$\frac{E_{1}}{E_{2}} = \frac{380}{760} = \frac{1}{2}$

0 0

New answer posted

a year ago

Carbylamine test is used to detect the presence of primary amino group in an organic compound. Which of the following compound is formed when this test in performed with aniline?

0 Follower 11 Views