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8 months ago

Class 12th Physics Moving Charges and Magnetism

A charge particle moves along circular path in a uniform magnetic field in a cyclotron. The kinetic energy of the charge particle increases to 4 times its initial value. What will be the ratio of new radius to the original radius of circular path of the charge particle:

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alok kumar singh

Contributor-Level 10

$\sqrt[]{k \cdot E}$

$\frac{r_{f}}{r_{0}} = \frac{\sqrt[]{k . E_{f}}}{k . E_{i}}$

$\frac{r_{f}}{r_{0}} = \frac{\sqrt[]{4 k . E_{i}}}{\sqrt[]{k . E_{i}}}$

$\frac{r_{f}}{r_{0}} = \frac{2}{1} = 2 : 1$

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8 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Ten

A 100 mL solution of CH₃CH₂MgBr on treatment with methanol produces 2.24 mL of a gas at STP. The weight of gas produced is __________ mg. [nearest integer]

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alok kumar singh

Contributor-Level 10

Moles of C₂H₆ = $\frac{2.24 * 1 0^{- 3}}{22.4} = 1 0^{- 4}$

Weight of C₂H₆ = 10^-4 * 30 = 3 mg

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8 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter One

The correct stability order of the following diazonium salt is

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Vishal Baghel

Contributor-Level 10

Electron donating group increases stability of diazonium salt. Whereas electron with drawing group decrease it.

-OCH₃ (+M), -NO₂ & -CN (-M)

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8 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Twelve

Total number of isomers (including stereoisomers) obtained on monochlorination of methylcyclohexane is_______________.

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alok kumar singh

Contributor-Level 10

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8 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter One

The major product of the following reaction is

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Vishal Baghel

Contributor-Level 10

Birch reduction takes place of carbon connected with electron withdrawing group (-NO₂)

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8 months ago

Class 12th Chemistry NCERT Exemplar Solutions Class 12th Chapter Eight

The spin-only magnetic moment value of the compound with strongest oxidizing ability among MnF₄, MnF₃ and MnF₂ is_________B.M [nearest integer]

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alok kumar singh

Contributor-Level 10

$\overset{+ 4}{M n F_{4}}$ $\overset{+ 3}{M n F_{3}}$

E.C = [Ar] 3d³ [Ar]3d⁴

$\begin{matrix} \overset{+ 2}{M n F_{2}} & [A r] 3 d^{5} \end{matrix} [\begin{array}{l} E_{M n^{3 +} | M n^{2 +}}^{0} = 1.57 V \\ E_{M n^{4 +} | M n^{2 +}}^{0} = 1.27 V \end{array}]$

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8 months ago

Class 12th Work, Energy and Power

A particle of mass 500 gm is moving in a straight line with velocity = The work done by the net force during its displacement from x = 0 to x = 4m is:

(Take b = 0.25m^-3/2s^-1).

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