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For a ramp input with a type-one system: $E_s=\lim_{s\to 0}\frac{s}{1+Y_1(s)}\cdot\frac{1}{s^2}=\frac{1}{\lim_{s\to 0}sY_1(s)}=\frac{1}{K_v}$. The velocity error constant $K_v=\lim_{s\to0}sY_1(s)$.

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Chemistry QUESTION #437

Question 9944

The extent of un-saturation in a fat is expressed as its

Acid number
Iodine number✔️
Saponification number
None of these

Correct Answer Logic:

Iodine number measures unsaturation

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MBBS QUESTION #10317

Question 9945

Oxidative damage to membrane polyunsaturated fatty acids, driven by free radicals and implicated in aging, atherosclerosis, and tissue injury, is termed:

Saponification
Lipid peroxidation✔️
Esterification
Beta-oxidation

Correct Answer Logic:

Lipid peroxidation is a chain-reaction process in which free radicals abstract hydrogen atoms from unsaturated fatty acid side chains, generating reactive lipid peroxides that damage membrane integrity; antioxidants such as vitamin E help limit this process.

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Maths QUESTION #2889

Question 9946

What is the value of $x$ if $\frac{x}{4} + 5 = 8$?

12✔️
4
3
7

Correct Answer Logic:

$x/4 = 3 \implies x = 3 \times 4 = 12$.

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Physics QUESTION #991

Question 9947

A rectangular metallic loop moves out of a uniform magnetic field region into a field-free region at constant speed. When partially inside, the plot of magnitude of induced emf $(\varepsilon)$ with time $(t)$ is:

Linearly increasing graph
Decreasing curve (exponential)
Linearly increasing then constant
Constant (horizontal line)✔️

Correct Answer Logic:

As the loop exits at constant speed, the rate of change of flux is constant ($\varepsilon = Bvl$ = constant). So the emf is constant with time — represented by a horizontal line. Answer key: option (4) = constant horizontal line.

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Planning QUESTION #4959

Question 9948

What is 'Induced Demand' in transportation planning?

Demand created by population growth
Additional traffic generated by new road capacity✔️
Demand for public transport
Seasonal traffic variation

Correct Answer Logic:

Induced Demand refers to additional vehicle trips generated when new road capacity is added, as improved travel times attract travelers who previously avoided trips or used other modes.

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MBBS QUESTION #10250

Question 9949

At high altitude, the fall in barometric pressure causes hypoxia despite the fraction of inspired oxygen (FiO2, 21%) remaining unchanged. Using $P_iO_2 = FiO_2 \times (P_{atm} - P_{H_2O})$, which parameter is primarily responsible?

The partial pressure of inspired oxygen (PiO2) falls because atmospheric pressure (Patm) falls✔️
Hemoglobin concentration falls immediately at altitude
Alveolar ventilation rate falls directly and independently of oxygen levels
Diffusion capacity of the lung membrane itself decreases

Correct Answer Logic:

Since FiO2 (21%) and water vapor pressure are essentially constant, a fall in total atmospheric pressure at altitude directly reduces the partial pressure of inspired oxygen (PiO2), reducing the driving gradient for oxygen diffusion into blood — the fundamental cause of high-altitude hypoxia.

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Electrical Engineering QUESTION #2192

Question 9950

A DC shunt motor draws $I_L = 50\,\text{A}$ from $V = 220\,\text{V}$. Given $R_a = 0.4\,\Omega$ and $R_f = 110\,\Omega$, the back-EMF $E_b$ and mechanical power developed are:

$E_b \approx 200.8\,\text{V}$, $P_{mech} \approx 9{,}638\,\text{W}$✔️
$E_b = 220\,\text{V}$, $P_{mech} = 11{,}000\,\text{W}$
$E_b = 196\,\text{V}$, $P_{mech} = 9{,}800\,\text{W}$
$E_b = 218\,\text{V}$, $P_{mech} = 10{,}900\,\text{W}$

Correct Answer Logic:

$I_f = V/R_f = 220/110 = 2\,\text{A}$. $I_a = I_L - I_f = 48\,\text{A}$. $E_b = V - I_a R_a = 220 - 48\times0.4 = 200.8\,\text{V}$. $P_{mech} = E_b\times I_a = 200.8\times48 \approx 9{,}638\,\text{W}$.

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Chemistry QUESTION #4339

Question 9951

Which one shows anisotropic behavior?

Wood
Gemstone
Coke
Graphite✔️

Correct Answer Logic:

Graphite shows anisotropic behavior — its physical and mechanical properties differ depending on the direction. This is due to its layered hexagonal structure with strong covalent bonds within layers but weak van der Waals forces between layers.

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Islamic Studies QUESTION #651

Question 9952

Al-Qanun fi al-Tibb (The Canon of Medicine) was written by:

Al-Razi
Ibn Sina✔️
Al-Biruni
None of these

Correct Answer Logic:

Ibn Sina (Avicenna) wrote this encyclopedia which remained a medical standard for centuries.

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Islamic Studies QUESTION #239

Question 9953

Who was the first to treat Hindus as 'People of the Book' (Zimmis)?

Hazrat Usman Ghani
Muhammad bin Qasim✔️
Muhallab bin Abi Safra
None of these

Correct Answer Logic:

During the conquest of Sindh, Muhammad bin Qasim extended protection to Hindus and Buddhists.

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Reading and Writing (Module-1) QUESTION #10434

Question 9954

The professor's ------- praise for the mediocre essay puzzled students who expected harsher criticism.

measured
effusive✔️
restrained
qualified

Correct Answer Logic:

Praise that 'puzzled students expecting harsher criticism' for a mediocre essay was excessive, matching 'effusive.'

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3343

Question 9955

'Lysis' of a cell means the cell:

Divides
Bursts or dissolves✔️
Shrinks
Moves faster

Correct Answer Logic:

Bacteriophages (viruses) often cause lysis of their bacterial hosts.

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Pakistan Affairs QUESTION #9068

Question 9956

The Indus Waters Treaty was signed between India and Pakistan during the regime of which Pakistani leader?

Ayub Khan✔️
Zulfikar Ali Bhutto
Liaquat Ali Khan
Pervez Musharraf

Correct Answer Logic:

The treaty was signed in 1960 under Ayub Khan.

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Math Physics Chemistry Biology QUESTION #7766

Question 9957

Which characteristic does NOT apply to smooth muscle?

Controlled by autonomic nervous system
Spindle-shaped cells
Lines the wall of the heart✔️
Lack striations

Correct Answer Logic:

Smooth muscle lines walls of hollow organs (blood vessels, intestines, bladder). Cardiac muscle lines the heart wall. Smooth muscle lacks striations, is involuntary, and cells are spindle-shaped.

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