Class 12th

Which one of the following is used to remove most of plutonium from spent nuclear fuel?

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Contributor-Level 10

O₂F₂ oxidises plutonium to PuF₆ and the reaction is used in removing plutonium as PuF₆ from spent nuclear fuel.

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The major product of the following reaction, if it occur by $S_{N}^{2}$ mechanism is:

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Class 12th Physics

Which one of the following chemicals is responsible for the production of HCl in the stomach leading to irritation and pain?

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Class 12th Electromagnetic Induction

Contributor-Level 10

Histamine stimulate the secretion of HCl

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A small square look offside 'a' and one turn is placed inside a larger square loop of side b and one turn (b >> a). The two loops are coplanar with their centres coinciding. If a current I is passed in the square loop offside 'b', then the coefficient of mutual inductance between the two loops is:

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Class 12th Physics Alternating Current

Contributor-Level 9

$? = M I$

Also

$? = \vec{B} . \vec{A} = B A c o s 0 °$

= 4 {\frac{μ_{0} l}{4 π (\frac{b}{2})} [\frac{1}{\sqrt[]{2}} + \frac{1}{\sqrt[]{2}}]} . a^{2}

? = 4 * \frac{μ_{0} l}{2 π b} \sqrt[]{2} a^{2}

And on comparing $?$ with

$? = M I$

$\frac{μ_{0}}{4 π} 8 \sqrt[]{2} \frac{a^{2}}{b} = M$

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a year ago

In an ac circuit, an inductor, a capacitor and a resistor are connected in series with $X_{L} = R = X_{C} .$ Impedance of this circuit is:

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Class 12th Physics Semiconductor Devices

Contributor-Level 9

$Z = \sqrt[]{R^{2} + {(X_{C} - X_{L})}^{2}}$

$Z = \sqrt[]{R^{2} + {(R - R)}^{2}} [? X_{L} = X_{C} = R \to G i v e n]$

Z = R

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a year ago

Choose the correct waveform that can represent the voltage across R of the following circuit, assuming the diode is ideal one:

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Contributor-Level 9

Diode, in forward biased condition only, will allow current to flow through it.

Pot. different across resistor is

Δ V = (10 s i n ω t - 3) v o l t

But in reverse biased condition of diode,

Δ V = 0

(across diode)

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a year ago

Which one of the following is the major product of the given reaction?

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Given below are two statements:

Statement I: Ethyl pent -4-yn-oate on reaction with CH₃MgBr gives a 3° -alcohol.

Statement II: In this reaction one mole of ethyl pent-4-yn-oate utilizes two moles of CH₃MgBr.

In the light of the above statements, choose the most appropriate answer from the options given below.

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Class 12th Physics Ncert Solutions Class 12th

Contributor-Level 10

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a year ago

If the sum of the heights of transmitting and receiving antennas in the line of sight of communication is fixed at 160m, then the maximum range of LOS communication is_______ km.

(Take radius of Earth = 6400km)

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Contributor-Level 9

$d M = \sqrt[]{2 R h_{T}} + \sqrt[]{2 R h_{R}}$

$? h_{T} + h_{R} = 160$

[Given]

So, hR = 160 - hT

$d_{M} = \sqrt[]{2 R h_{T}} + \sqrt[]{2 R (160 - h_{T})}$

$∴ d_{M} = \sqrt[]{2 * 6400000 * 80} + \sqrt[]{2 * 6400000 * 80}$

$= 2 * 4 * 8 * 1 0^{3}$

dM = 64 km

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a year ago

Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803K?

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