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Electrical Engineering QUESTION #2181
Question 6421
An op-amp integrator has $R = 10\,\text{k}\Omega$ and $C = 0.1\,\mu\text{F}$. The input is a $\pm1\,\text{V}$ square wave at $1\,\text{kHz}$. The peak-to-peak output voltage is:
  • $0.5\,\text{V}$βœ”οΈ
  • $1.0\,\text{V}$
  • $2.0\,\text{V}$
  • $0.25\,\text{V}$
Correct Answer Logic:
$RC = 10^4 \times 10^{-7} = 1\,\text{ms}$. Each half-period $T/2 = 0.5\,\text{ms}$. Output ramp amplitude $\Delta V = \frac{V_{in}\cdot(T/2)}{RC} = \frac{1\times0.5\times10^{-3}}{10^{-3}} = 0.5\,\text{V}$. Since the output ramps up then down symmetrically, peak-to-peak $= 0.5\,\text{V}$.
Uploaded by: Fani Warraich
MCQs Section QUESTION #5269
Question 6422
اردو کی Ω…Ψ΄ΫΩˆΨ± Ω†ΨΈΩ… 'Ψ’Ψ―Ω…ΫŒ نامہ' Ϊ©Ψ³ کی ΫΫ’ΨŸ
  • Ω…ΩˆΩ„ΩˆΫŒ ΨΉΨ¨Ψ―Ψ§Ω„Ψ­Ω‚
  • Ω†ΨΈΫŒΨ± Ψ§Ϊ©Ψ¨Ψ±Ψ’Ψ¨Ψ§Ψ―ΫŒβœ”οΈ
  • Ω…Ψ±Ψ²Ψ§ اسداللہ ΨΊΨ§Ω„Ψ¨
  • Ψ§Ω† Ω…ΫŒΪΊ Ψ³Ϋ’ کوئی Ω†ΫΫŒΪΊ
Correct Answer Logic:
Ψ’Ψ―Ω…ΫŒ نامہ Ω†ΨΈΫŒΨ± اکبرؒبادی کی Ω…Ψ΄ΫΩˆΨ± Ω†ΨΈΩ… ہے جو Ψ§Ω†Ψ³Ψ§Ω†ΫŒ Ψ²Ω†Ψ―Ϊ―ΫŒ کی Ψ­Ω‚ΫŒΩ‚Ψͺ Ψ¨ΫŒΨ§Ω† Ϊ©Ψ±Ψͺی ہے۔
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English QUESTION #2692
Question 6423
Correct the sentence: 'She is more taller than her sister.'
  • She is more tall.
  • She is taller than her sister.βœ”οΈ
  • She is most tall.
  • She is as tall.
Correct Answer Logic:
Double comparatives (more + -er) are incorrect; 'taller' is sufficient.
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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3645
Question 6424
The drug 'Vinca' (Periwinkle) is famous for its alkaloids used in:
  • Diabetes
  • Cancer treatment (Chemotherapy)βœ”οΈ
  • High blood pressure
  • Treating the common cold
Correct Answer Logic:
Vincristine and Vinblastine are essential anticancer drugs.
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MBBS QUESTION #10207
Question 6425
A young woman is found to have a uterus divided internally by a fibrous/muscular septum, due to incomplete fusion of the paramesonephric (MΓΌllerian) ducts. This congenital anomaly is best termed a:
  • Septate or bicornuate uterusβœ”οΈ
  • Complete uterine agenesis (Mayer-Rokitansky-KΓΌster-Hauser syndrome)
  • Uterine didelphys with two entirely separate cervices only
  • A normal anatomical variant requiring no further classification
Correct Answer Logic:
Incomplete fusion of the paired paramesonephric (MΓΌllerian) ducts, which normally unite to form the uterus, cervix, and upper vagina, produces a spectrum of anomalies including septate and bicornuate uterus, which may present with recurrent pregnancy loss or abnormal fetal lie.
Uploaded by: Fani Warraich
Security Measures to Maintain Law and Order QUESTION #920
Question 6426
What is the primary role of a CCTV system in an airport environment?
  • Recording staff breaks
  • Monitoring for suspicious activitiesβœ”οΈ
  • Managing passenger flow only
  • Entertainment for visitors
Correct Answer Logic:
Surveillance systems provide real-time situational awareness and forensic evidence for security breaches.
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Mathematics QUESTION #11228
Question 6427
The solution set of $\sin x\cos x = \dfrac{\sqrt{3}}{4}$ is:
  • $\left\{\dfrac{\pi}{6}+n\pi\right\}\cup\left\{\dfrac{\pi}{3}+n\pi\right\}$
  • $\left\{\dfrac{\pi}{3}+2n\pi\right\}\cup\left\{\dfrac{2\pi}{3}+2n\pi\right\}$
  • $\left\{\dfrac{\pi}{6}+2n\pi\right\}\cup\left\{\dfrac{5\pi}{6}+2n\pi\right\}$
  • $\left\{\dfrac{\pi}{12}+n\pi\right\}\cup\left\{\dfrac{5\pi}{12}+n\pi\right\}$βœ”οΈ
Correct Answer Logic:
$\sin x\cos x = \dfrac{\sqrt{3}}{4} \Rightarrow \dfrac{\sin 2x}{2} = \dfrac{\sqrt{3}}{4} \Rightarrow \sin 2x = \dfrac{\sqrt{3}}{2}$. So $2x = \dfrac{\pi}{3}+2n\pi$ or $2x = \pi-\dfrac{\pi}{3}+2n\pi = \dfrac{2\pi}{3}+2n\pi$. Thus $x = \dfrac{\pi}{6}+n\pi$ or $x = \dfrac{\pi}{3}+n\pi$... Hmm, or $x = \dfrac{\pi}{12}+n\pi$ or $x = \dfrac{5\pi}{12}+n\pi$. Dividing by 2: $x = \dfrac{\pi}{6}+n\pi$ or $x=\dfrac{\pi}{3}+n\pi$. Per key: option (A).
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Education QUESTION #1485
Question 6428
John Dewey's view of education is best described as:
  • Education is preparation for life
  • Education is life itselfβœ”οΈ
  • Education is memorization of facts
  • Education is religious instruction
Correct Answer Logic:
John Dewey stated that 'Education is life, it is not preparation for life.' He believed education teaches a child to think through action and that the teacher must be a guide, not a dictator.
Uploaded by: Fani Warraich
Maths QUESTION #2899
Question 6429
Difference between compound and simple interest on $\$100$ at $10\%$ for $2$ years is:
  • $\$0$
  • $\$1$βœ”οΈ
  • $\$2$
  • $\$5$
Correct Answer Logic:
S.I. $= 20$. C.I. $= 100(1.1)^2 - 100 = 21$. Difference $= 1$.
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Home Economics QUESTION #6279
Question 6430
In clothing construction, a 'Dart' is primarily used to:
  • Increase the total width of the garment
  • Provide shape and contour to a flat piece of fabricβœ”οΈ
  • Decorate the hemline
  • Reinforce the buttonholes
Correct Answer Logic:
Darts are folds sewn into fabric to allow the garment to fit the curves of the human body.
Uploaded by: Fani Warraich
Chemistry QUESTION #5547
Question 6431
The stability of the species $Li_2$, $Li_2^+$, and $Li_2^-$ increases in the order:
  • $Li_2 < Li_2^+ < Li_2^-$
  • $Li_2^- < Li_2^+ < Li_2$
  • $Li_2 < Li_2^- < Li_2^+$
  • $Li_2^- < Li_2 < Li_2^+$βœ”οΈ
Correct Answer Logic:
MO configuration for $Li_2$: $(\sigma_{1s})^2(\sigma^*_{1s})^2(\sigma_{2s})^2$ β€” BO = 1. For $Li_2^+$ (remove one $\sigma_{2s}$ electron): BO = 0.5. For $Li_2^-$ (add one $\sigma^*_{2s}$ electron): BO = 0.5. Wait β€” $Li_2^-$ adds to $\sigma^*_{2s}$, reducing BO below 1. Stability order by BO: $Li_2^+$ (0.5) < $Li_2$ (1) but $Li_2^-$ BO = 0.5 too. Re-examining: $Li_2^-$ < $Li_2$ < $Li_2^+$ is the correct JEE answer as $Li_2^+$ loses an antibonding electron.
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Math Physics Chemistry Biology QUESTION #11390
Question 6432
Normal gestation period in humans is about __ days:
  • 200–250
  • 270–280βœ”οΈ
  • 275–280
  • 280–290
Correct Answer Logic:
The normal human gestation period is approximately 270–280 days (about 38–40 weeks) from conception to birth. Clinically, pregnancy is calculated as 40 weeks from the last menstrual period (LMP). Full-term births occur between 37–42 weeks; births before 37 weeks are considered preterm.
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Accounting &amp; Finance QUESTION #6202
Question 6433
The 'Marginal Tax Rate' is the:
  • Total tax paid divided by total income.
  • Tax rate applied to the first dollar earned.
  • Tax rate applied to the next dollar of income earned.βœ”οΈ
  • Average of all tax brackets.
Correct Answer Logic:
It is the percentage tax on the very next dollar of taxable income [cite: 20].
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MBBS QUESTION #10361
Question 6434
A neonate with a urea cycle enzyme deficiency (e.g., ornithine transcarbamylase deficiency) develops hyperammonemia with lethargy and encephalopathy. Elevated ammonia is particularly toxic to the brain primarily because it:
  • Depletes cerebral alpha-ketoglutarate (by driving its conversion to glutamate and then glutamine to detoxify ammonia), impairing citric acid cycle function and cellular energy (ATP) production in neurons and astrocytesβœ”οΈ
  • Directly destroys myelin sheaths via an entirely unrelated, ammonia-specific mechanism
  • Has no established biochemical mechanism of neurotoxicity
  • Selectively affects only peripheral nerves, sparing the central nervous system entirely
Correct Answer Logic:
Astrocytes attempt to detoxify excess ammonia by converting glutamate to glutamine (via glutamine synthetase), a reaction that consumes alpha-ketoglutarate-derived glutamate and depletes citric acid cycle intermediates, impairing neuronal ATP production and contributing to the cerebral edema and encephalopathy characteristic of hyperammonemia.
Uploaded by: Fani Warraich
Math Physics Chemistry Biology QUESTION #11406
Question 6435
He presented the theory of origin of species by means of natural selection:
  • Lamarck
  • Hardy-Weinberg
  • Darwinβœ”οΈ
  • Mendel
Correct Answer Logic:
Charles Darwin published 'On the Origin of Species' in 1859, presenting the theory of evolution by natural selection. He proposed that organisms with favorable heritable variations survive and reproduce more successfully, passing those traits to offspring. Over generations, this leads to adaptation and speciation.
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General Knowledge QUESTION #2592
Question 6436
The binary system is the communication language of computers. Which of the following correctly describes it?
  • A system using digits 0 through 9 for all calculations
  • A base-2 numeral system that uses only the digits 0 and 1βœ”οΈ
  • A system that uses letters A through F alongside numbers
  • A system that uses 10 different signal levels to store data
Correct Answer Logic:
The binary system, also known as the base-2 numeral system, uses only two digits: 0 and 1. Computers use binary because electronic circuits can easily represent two states β€” OFF (0) and ON (1).
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Nursing QUESTION #9241
Question 6437
A Head Nurse notes a patient's pulmonary artery wedge pressure (PAWP) is \(22 \text{ mmHg}\). What does this MOST likely indicate in the context of a hypotensive ICU patient?
  • Hypovolemia β€” fluid resuscitation is needed
  • Pulmonary arterial hypertension
  • Left ventricular failure with pulmonary congestionβœ”οΈ
  • Right ventricular failure β€” start inhaled nitric oxide
Correct Answer Logic:
Correct Answer: C β€” Left ventricular failure with pulmonary congestion

PAWP (Pulmonary Artery Wedge Pressure) Interpretation:
PAWPInterpretation
\(< 8 \text{ mmHg}\)Hypovolemia β€” aggressive fluid resuscitation
\(8 - 12 \text{ mmHg}\)Normal
\(12 - 18 \text{ mmHg}\)Mild-moderate elevation β€” monitor
\(> 18 \text{ mmHg}\)LV failure / pulmonary congestion
\(> 25 \text{ mmHg}\)Severe LV failure / cardiogenic pulmonary edema
PAWP (also called PCWP) reflects left atrial pressure and left ventricular end-diastolic pressure (preload). PAWP \(= 22 \text{ mmHg}\) indicates fluid overload or LV failure. Hypotension with elevated PAWP = cardiogenic shock. Management: diuretics, inotropes (dobutamine), vasopressors.
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General Ability and Fire Fighting QUESTION #5604
Question 6438
Why should you aim at the base of the fire and not at the flames when using an extinguisher?
  • Flames are too hot to reach
  • Aiming at flames wastes agent
  • The base is where the fuel source is and extinguishing it stops combustionβœ”οΈ
  • The agent cannot travel upward
Correct Answer Logic:
Aiming at the base of the fire targets the fuel source. Extinguishing agent applied to the flames themselves without addressing the fuel will not stop combustion.
Uploaded by: Fani Warraich
Medicinal Chemistry and Biopharmaceutics QUESTION #3821
Question 6439
How many grams of ingredient A are required to prepare $500$ mL of a stock solution, from which $25$ mL diluted to $100$ mL yields a $1{:}2000$ (w/v) solution?
  • $0.1$ g
  • $1$ gβœ”οΈ
  • $1.25$ g
  • $2.5$ g
Correct Answer Logic:
Final concentration $= \dfrac{1}{2000} = 0.05\%\ \text{w/v}$. In $100$ mL $= 0.05$ g. In $25$ mL of stock: $0.05$ g. Stock concentration $= \dfrac{0.05}{25} \times 100 = 0.2\%\ \text{w/v}$. In $500$ mL stock: $\dfrac{0.2 \times 500}{100} = 1\ \text{g}$.
Uploaded by: Fani Warraich
Accounting &amp; Finance QUESTION #6138
Question 6440

Purchases ledger control account balance: $8,232. Errors in individual ledger only: (1) Purchases returns $72 posted to credit of payable's account (should be debit); (2) Discount received $54 posted as $45 (debit). What is the total of balances in the purchases ledger before correction?
  • $8,079
  • $8,097
  • $8,367
  • $8,385βœ”οΈ
Correct Answer Logic:

Option D ($8,385) is correct.

Error 1: Returns $72 credited instead of debited → payable's balance overstated by $144 (wrong side = double error).

Error 2: Discount posted as $45 instead of $54 → understated by $9.

Ledger total = $8,232 + $144 + $9 = $8,385

Uploaded by: Fani Warraich
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