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English QUESTION #2774

Which ONE WORD means: 'A doctor who treats diseases of the mind'?

Physician
Cardiologist
Neurologist
Psychiatrist✔️

Correct Answer Logic:

A 'Psychiatrist' is a medical doctor who specializes in the diagnosis and treatment of mental disorders. A Physician is a general doctor; Cardiologist treats heart diseases; Neurologist treats nervous system disorders.

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Electrical Engineering QUESTION #2137

Question 5082

In a balanced three-phase star-connected system, what is the phase relationship between the line voltage $V_L$ and its corresponding phase voltage $V_{ph}$?

$V_L$ leads $V_{ph}$ by $30^\circ$✔️
$V_L$ lags $V_{ph}$ by $30^\circ$
$V_L$ and $V_{ph}$ are in phase
$V_L$ leads $V_{ph}$ by $120^\circ$

Correct Answer Logic:

In a star (Wye) connection, the line voltage is $\sqrt{3}$ times the phase voltage and leads the phase voltage by $30^\circ$.

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Education QUESTION #11640

Question 5083

According to developmental psychology, moods and emotional dispositions are primarily formed during which stage of life?

Infancy
Adolescence✔️
Adulthood
None of these

Correct Answer Logic:

In developmental psychology, stable moods and characteristic emotional dispositions are considered to be significantly shaped during adolescence, when hormonal changes, identity formation, and peer relationships play a major role in establishing emotional patterns.

Correct Answer: B — Adolescence.

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Chemistry QUESTION #7409

Question 5084

Which of the following statements about atomic properties is WRONG?

Atomic radius increases as one moves down the first group
Atomic radius decreases from left to right across the second period
Among isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius✔️
Among isoelectronic species, greater the negative charge on the anion, larger is the ionic radius

Correct Answer Logic:

Isoelectronic species and ionic radius:
For cations with the same number of electrons, a larger positive charge means more protons pulling the same electrons — smaller radius. So smaller positive charge → larger ionic radius (not smaller). Option (3) reverses this logic and is therefore wrong.

Options (1), (2), and (4) are correct periodic trend statements.

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General Ability and Fire Fighting QUESTION #5613

Question 5085

Which fire class requires a specialized dry powder extinguisher?

Class A
Class B
Class C
Class D✔️

Correct Answer Logic:

Class D fires involve combustible metals like magnesium and potassium. These metals can react with water and standard agents

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Mathematics QUESTION #1299

Question 5086

The solution of $\sqrt{1-y^2}\,dx-\sqrt{1-x^2}\,dy=0$ with $y(0)=\dfrac{\sqrt{3}}{2}$ is:

$\arcsin x - \arcsin y = \dfrac{\pi}{3}$
$\arcsin x = \arcsin y - \dfrac{\pi}{3}$✔️
$x + y = \sqrt{3}$
$\arcsin x + \arcsin y = \pi$

Correct Answer Logic:

Integrating: $\arcsin x = \arcsin y + C$. At $x=0$, $y=\dfrac{\sqrt{3}}{2}$: $0=\arcsin\dfrac{\sqrt{3}}{2}+C=\dfrac{\pi}{3}+C\Rightarrow C=-\dfrac{\pi}{3}$. So $\arcsin x=\arcsin y-\dfrac{\pi}{3}$.

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Logical Reasoning QUESTION #3937

Question 5087

What is the most opposite to the meaning of 'GREGARIOUS'?

Sociable✔️
Introverted
Friendly
Hostile

Correct Answer Logic:

1

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Math Physics Chemistry Biology QUESTION #729

Question 5088

One light year is equal to:

9 x 10^12 m
6 x 10^12 m
9.5 x 10^13 m✔️
None

Correct Answer Logic:

One light year is the distance light travels in one year = 9.461 x 10^15 m ≈ 9.5 x 10^15 m. The closest answer is 9.5 x 10^13 m (option C as given in paper).

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English QUESTION #490

Question 5089

He came to the hurdles that he remember, over which once he had so easy a victory.

came to the hurdles that he remember
over which once✔️
he had so easy a victory
None of these

Correct Answer Logic:

Error: 'remember' should be 'remembered'

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General Knowledge QUESTION #8676

Question 5090

Which is the largest agency in FATA by area?

North Waziristan
Malakand
South Waziristan✔️
None of above

Correct Answer Logic:

South Waziristan is the largest FATA agency.

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Math Physics Chemistry Biology QUESTION #11322

Question 5091

Which of the following is a sex-influenced gene?

A
B✔️
C
D

Correct Answer Logic:

Gene B is an example of a sex-influenced gene.

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Planning QUESTION #4924

Question 5092

In urban design, what does 'human scale' refer to?

The average height of buildings
Design proportions related to human dimensions✔️
The number of people in an area
The walking distance capacity

Correct Answer Logic:

Human scale in urban design refers to designing spaces and buildings with proportions and dimensions that relate comfortably to human body size and perception, creating comfortable, accessible environments.

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Physics QUESTION #391

Question 5093

A 5 Ohm resistor is indicated by a single __________ color band around its body.

Red
Green✔️
Blue
Brown

Correct Answer Logic:

Green band indicates 5 ohms in resistor color code

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General Knowledge QUESTION #8997

Question 5094

Who is called the 'Man of Destiny' in European history?

Napoleon Bonaparte✔️
Otto von Bismarck
Adolf Hitler
Charles de Gaulle

Correct Answer Logic:

Napoleon is often called the 'Man of Destiny'.

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Verbal Reasoning QUESTION #8161

Question 5095

The ratio $\dfrac{1}{3} : \dfrac{3}{8}$ is equal to which of the following ratios?

$1$ to $8$
$8$ to $1$
$8$ to $3$
$8$ to $9$✔️

Correct Answer Logic:

To find the ratio $\dfrac{1}{3} : \dfrac{3}{8}$, divide the first by the second:

$\dfrac{1/3}{3/8} = \dfrac{1}{3} \times \dfrac{8}{3} = \dfrac{8}{9}$

So the ratio is $\dfrac{8}{9}$, which means $8$ to $9$.

You can verify: multiply both original fractions by 24 (the LCM of 3 and 8): $\dfrac{1}{3} \times 24 = 8$ and $\dfrac{3}{8} \times 24 = 9$. Ratio is $8:9$.

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Mathematics QUESTION #1325

Question 5096

For the ODE $y''-2y'+2y=0$, the general solution using roots $r=1\pm i$ is:

$y=e^x(C_1+C_2 x)$
$y=C_1e^x\cos x+C_2e^x\sin x$✔️
$y=C_1\cos x+C_2\sin x$
$y=e^{-x}(C_1\cos x+C_2\sin x)$

Correct Answer Logic:

For complex roots $r=\alpha\pm\beta i$, the real general solution is $y=e^{\alpha x}(C_1\cos\beta x+C_2\sin\beta x)$. Here $\alpha=1$, $\beta=1$, so $y=e^x(C_1\cos x+C_2\sin x)$.

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General Knowledge QUESTION #4781

Question 5097

The Channel Tunnel is an undersea rail tunnel linking which two countries?

England and Ireland
England and France✔️
France and Germany
Belgium and England

Correct Answer Logic:

The Channel Tunnel (Chunnel) is a 50.45-kilometer railway tunnel beneath the English Channel, linking Folkestone in England with Coquelles near Calais in northern France.

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MBBS QUESTION #10238

Question 5098

The plateau (phase 2) of the ventricular myocardial action potential, mediated by a balance of inward calcium current and outward potassium current, is physiologically important because it:

Produces a prolonged refractory period that prevents tetanic contraction of cardiac muscle✔️
Is responsible for the rapid depolarization (phase 0) seen on the action potential upstroke
Causes the resting membrane potential to become unstable
Has no relationship to the QT interval on the surface ECG

Correct Answer Logic:

The prolonged plateau phase keeps the myocardium refractory to new stimuli for almost the entire duration of contraction, preventing summation and tetany — essential for the heart's rhythmic pump function. This phase corresponds to the ST segment/QT interval on the surface ECG, and its calcium influx also couples excitation to contraction.

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