Reading Mode - Questions

The Zeeman effect is the splitting of spectral lines when an atom is placed in an external magnetic field. It arises due to the interaction between the externally applied magnetic field and the total magnetic moment (orbital + spin) of the atom. The energy levels split according to $\Delta E = m_l \mu_B B$.

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Chemistry QUESTION #7811

Question 11405

Hemoglobin is a protein with which structural level?

Primary
Secondary
Tertiary
Quaternary✔️

Correct Answer Logic:

Hemoglobin has four polypeptide chains (two α, two β), each with tertiary structure, assembled into quaternary structure.

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Aptitude QUESTION #11000

Question 11406

Which ancient Indian monument features one of the world's largest free-standing stone domes?

Taj Mahal
Gol Gumbaz✔️
Brihadeeswarar Temple
Sanchi Stupa

Correct Answer Logic:

Gol Gumbaz in Bijapur, Karnataka, built in 1656, has a massive free-standing dome with an external diameter of $44$ meters.

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Reading and Writing (Module-1) QUESTION #10443

Question 11407

In 1850 the wetland supported only a handful of migratory bird species, but the number has since ------- to more than -------.

dwindled . . a dozen
expanded . . two hundred✔️
stabilized . . fifty
diminished . . a hundred

Correct Answer Logic:

A small starting number that later grows dramatically 'expanded . . to more than two hundred.'

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English Literature QUESTION #10691

Question 11408

There was a great hue and cry against Hardy's novels Tess and Jude the Obscure because of __________ in them.

Obscenity
Violence
Abnormality
Heresy✔️

Correct Answer Logic:

Thomas Hardy's novels Tess of the d'Urbervilles (1891) and Jude the Obscure (1895) caused public outrage primarily because of their perceived heresy — they challenged conventional Victorian religious morality, attacked the institution of marriage, and questioned Christian doctrine. Jude was even called 'Jude the Obscene' and Hardy burnt his mail in response to hostility. He never wrote another novel after it.

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Maths QUESTION #7661

Question 11409

In an Arithmetic Progression, if $a_1 = 28$, $d = -4$, $n = 7$, then $a_n$ is:

$4$✔️
$5$
$3$
None of these

Correct Answer Logic:

Using the formula $a_n = a_1 + (n-1)d$, we have: $a_7 = 28 + (7-1)(-4) = 28 + 6(-4) = 28 - 24 = 4$. Therefore, the 7th term of this arithmetic progression is 4.

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Maths QUESTION #7995

Question 11410

$3^{72/100}$ written as a fraction is:

3.72
37.2
0.372✔️
372

Correct Answer Logic:

$3^{72/100} = 3.72$ — wait, this is a notation question. $3\tfrac{72}{100} = 3 + 0.72 = 3.72$ as a decimal, or $\dfrac{372}{100} = 0.372$ when simplified... The answer key gives C (0.372). Note: $\dfrac{372}{100} = 3.72$ not 0.372. Answer key may contain a typo; the mixed number $3\tfrac{72}{100} = 3.72$.

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Statistics QUESTION #1998

Question 11411

In a simple linear regression of number of breakdowns $(Y)$ on machine age $(X)$, the least squares estimate of slope $\hat{\beta}$ is given by:

$\dfrac{SS_{xy}}{SS_{xx}}$✔️
$\dfrac{SS_{xx}}{SS_{xy}}$
$\dfrac{SS_{yy}}{SS_{xx}}$
$\dfrac{SS_{xy}}{SS_{yy}}$

Correct Answer Logic:

The least squares slope estimate is $\hat{\beta} = \dfrac{SS_{xy}}{SS_{xx}} = \dfrac{\sum(X_i - \bar{X})(Y_i - \bar{Y})}{\sum(X_i - \bar{X})^2}$. The intercept is then $\hat{\alpha} = \bar{Y} - \hat{\beta}\bar{X}$.

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Academic/Professional (Social Sciences) QUESTION #6492

Question 11412

In sociology, 'Ethnocentrism' refers to:

Judging another culture by its own standards
Judging another culture by the standards of one's own culture✔️
The belief that all cultures are equal
The process of learning a new culture

Correct Answer Logic:

Ethnocentrism is the tendency to view one's own culture as superior and use it as a benchmark for others.

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Mathematics QUESTION #7478

Question 11413

Let $\vec{a} = \hat{i} + \hat{j} + \sqrt{2}\hat{k}$, $\vec{b} = b_1\hat{i} + b_2\hat{j} + \sqrt{2}\hat{k}$ and $\vec{c} = 5\hat{i} + \hat{j} + \sqrt{2}\hat{k}$ be three vectors such that the projection vector of $\vec{b}$ on $\vec{a}$ is $\vec{a}$. If $\vec{a}+\vec{b}$ is perpendicular to $\vec{c}$, then $|\vec{b}|$ is equal to:

$\sqrt{32}$
6✔️
$\sqrt{22}$
4

Correct Answer Logic:

Projection of $\vec{b}$ on $\vec{a}$ is $\frac{\vec{b} \cdot \vec{a}}{|\vec{a}|^2}\vec{a} = \vec{a}$. So $\vec{b} \cdot \vec{a} = |\vec{a}|^2 = 1+1+2 = 4$. Thus $b_1 + b_2 + 2 = 4$, giving $b_1+b_2 = 2$. Condition $(\vec{a}+\vec{b}) \perp \vec{c}$: $(1+b_1)(5) + (1+b_2)(1) + (2\sqrt{2})(\sqrt{2}) = 0$, giving $5+5b_1+1+b_2+4 = 0$, so $10+5b_1+b_2 = 0$. From $b_1+b_2=2$: $b_2 = 2-b_1$, substituting: $10+5b_1+2-b_1 = 0$, so $4b_1 = -12$ and $b_1 = -3$, giving $b_2 = 5$. Thus $\vec{b} = -3\hat{i}+5\hat{j}+\sqrt{2}\hat{k}$, and $|\vec{b}| = \sqrt{9+25+2} = \sqrt{36} = 6$.

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General Knowledge QUESTION #11478

Question 11414

What is the standard function of the shortcut key combination Ctrl + O in MS Word?

Save Document
Print Document
Close Document
Open Document✔️

Correct Answer Logic:

Ctrl+O opens the Open dialog in Microsoft Word (and most Windows applications), allowing you to browse and open an existing file. Related shortcuts: Ctrl+S = Save, Ctrl+P = Print, Ctrl+N = New document, Ctrl+W = Close document.

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English QUESTION #2792

Question 11415

Which is the CORRECTLY SPELLED word?

Neccessary
Necesary
Neccesary
Necessary✔️

Correct Answer Logic:

The correct spelling is 'Necessary' — one 'c' and double 's'. A helpful mnemonic: a shirt has one Collar (1 c) and two Sleeves (2 s's) — so 'necessary' has 1 'c' and 2 's'.

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