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Physics QUESTION #1058

An electron (mass $9\times10^{-31}\ \text{kg}$, charge $1.6\times10^{-19}\ \text{C}$) moves at $c/100$ in field $B=9\times10^{-4}\ \text{T}$. Electric field $E$ to prevent deflection:

E parallel to B, magnitude $27\times10^2\ \text{V/m}$
E parallel to B, magnitude $27\times10^4\ \text{V/m}$
E perpendicular to B, magnitude $27\times10^4\ \text{V/m}$✔️
E perpendicular to B, magnitude $27\times10^2\ \text{V/m}$

Correct Answer Logic:

For no deflection: electric force must balance magnetic force. $qE=qvB\Rightarrow E=vB=\frac{3\times10^8}{100}\times9\times10^{-4}=3\times10^6\times9\times10^{-4}=27\times10^2\ \text{V/m}$. E must be perpendicular to B (to oppose magnetic force direction). So E perpendicular to B, magnitude $27\times10^2\ \text{V/m}$ = option (4).

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General Knowledge QUESTION #8867

Question 2

Who presented the Law of Falling Bodies (gravity)?

Isaac Newton
Albert Einstein
Galileo Galilei✔️
Bertrand Russell

Correct Answer Logic:

Galileo studied falling bodies.

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Accounting Finance and Punjab Sales Tax on Services QUESTION #2577

Question 3

Under the Offences and Penalties Schedule Entry No. 24, where a person refuses to RECEIVE any notice or order issued by an officer of the Authority, the penalty is:

Twenty thousand rupees fixed
Fifty thousand rupees or one hundred percent of the tax payable for the tax period to which the offence relates, whichever is higher✔️
One hundred thousand rupees fixed
Ten percent of the tax payable

Correct Answer Logic:

Entry No. 24 provides that where any person refuses to receive any notice or order, such person shall be liable to pay a penalty of FIFTY THOUSAND RUPEES OR ONE HUNDRED PERCENT of the tax payable for the tax period to which the offence relates, whichever is HIGHER.

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Biology Zoology Botany QUESTION #1367

Question 4

What is the characteristic feature of the Fabaceae family?

Composite flowers
Opposite leaves
Papilionaceous corolla✔️
Parallel venation

Correct Answer Logic:

Fabaceae (legume family, previously Leguminosae) is characterised by the papilionaceous (butterfly-like) corolla consisting of 5 petals: 1 standard (vexillum), 2 wings (alae), and 2 fused keel petals (carina). Other features include compound leaves, stipules, and the presence of root nodules with nitrogen-fixing Rhizobium bacteria.

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Home Economics QUESTION #6287

Question 5

Which management style involves the leader making all decisions without consulting family members?

Autocratic✔️
Participatory
Democratic
Laissez-faire

Correct Answer Logic:

Autocratic management is centralized and leaves no room for group input.

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Boilers Mechanical Engineering QUESTION #3998

Question 6

'Draft' (Draught) in a boiler furnace is required to:

Wash the furnace
Provide a continuous supply of air for combustion and remove flue gases✔️
Keep the operator cool
Measure the water level

Correct Answer Logic:

Natural draft is created by the chimney; forced/induced draft uses fans.

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English QUESTION #2738

Question 7

'He said

"I will come tomorrow."' — Choose the correct INDIRECT SPEECH.✔️
He said that he will come the next day.
He said that he would come the next day.
He said that he came the next day.

Correct Answer Logic:

1

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3254

Question 8

'Total Peripheral Resistance' ($TPR$) increases when:

Blood vessels dilate
Blood viscosity increases✔️
Blood pressure drops
Exercise starts

Correct Answer Logic:

Thicker blood (higher viscosity) or constricted vessels increase resistance.

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Paper-I (Pharmaceutics II (Industrial and Quality Control) and Pharmaceutics III (Hospital and Community Pharmacy)) QUESTION #5737

Question 9

In 'Communicable Disease Control (CDC)', what is the simplest method of controlling a disease by 'Controlling the Reservoir'?

Improving the hospital lighting
Early diagnosis or isolation of the infected person✔️
Giving a patient a walker
Changing the pharmacy layout

Correct Answer Logic:

Elimination of the reservoir through isolation is the simplest method.

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Paper-II (Pharmacognosy and Pharmaceutics-I) QUESTION #3595

Question 10

'Digitalis purpurea' (Foxglove) contains glycosides used as:

Laxatives
Cardiotonics (Heart stimulants)✔️
Sedatives
Antiseptics

Correct Answer Logic:

Digitalis increases the force of heart contraction in heart failure.

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Library Sciences QUESTION #1531

Question 11

According to Katz (2002), which of the following is the key distinction between a 'ready-reference' question and a 'research' reference question?

Ready-reference questions are only asked in person; research questions are asked online
Ready-reference questions require brief factual answers quickly found in standard sources; research questions require in-depth searching across multiple sources✔️
Ready-reference questions involve government documents; research questions involve academic journals
Ready-reference questions are answered by paraprofessionals; research questions require a PhD

Correct Answer Logic:

Katz (2002) distinguishes ready-reference questions — which require quick, specific factual answers (e.g., a date, a definition, a statistic) findable in a single standard source — from research questions, which are complex, require extended searching, and involve synthesizing information from multiple sources.

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CISA QUESTION #1751

Question 12

Which of the following is NOT a purpose of the ISO 15489 records management standard?

Define minimum legal handling requirements for data records
Provide a legal standard of negligence and culpability
Eliminate the need for a detailed classification list for each data set✔️
Define governance responsibilities across the data life cycle

Correct Answer Logic:

ISO 15489 defines the minimum handling process for records of value and requires an information classification system — a list of each data set to be protected. It does not eliminate the need for such a list; rather, it mandates one as a core governance control.

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Economics QUESTION #1709

Question 13

The Chinn-Ito index (KAOPEN), frequently cited in cross-country empirical research on financial integration and capital mobility, is specifically designed to quantify a country's:

Total factor productivity in the manufacturing sector
Degree of capital account openness based on IMF's AREAER restrictions✔️
Nominal and real exchange rate volatility over a rolling period
None of these

Correct Answer Logic:

The Chinn-Ito index (developed by Menzie Chinn and Hiro Ito) is a de jure measure of capital account openness — it quantifies the extent to which a country restricts or liberalises cross-border capital transactions, based on binary variables derived from the IMF's Annual Report on Exchange Arrangements and Exchange Restrictions (AREAER). A higher KAOPEN score indicates a more open capital account. Pakistan's score has historically been low, reflecting significant capital account restrictions.

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Math Physics Chemistry Biology QUESTION #794

Question 14

The comparative rate at which solute moves in paper chromatography depends upon $R_f$ value of:

Solute✔️
Solution
Solvent
None

Correct Answer Logic:

The $R_f$ (retention factor) value is specific to the solute and describes how far it travels relative to the solvent front in chromatography.

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MCQs Section QUESTION #5136

Question 15

مشتاق احمد یوسفی کی وجۂ شہرت کیا ہے؟

ڈرامہ نگاری
تنقید نگاری
مزاح نگاری✔️
ان میں سے کوئی نہیں

Correct Answer Logic:

مشتاق احمد یوسفی اردو کے عظیم مزاح نگار ہیں۔ 'زرگزشت' اور 'آب گم' ان کے مشہور مجموعے ہیں۔

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3372

Question 16

'Opsonization' is the process where:

Bacteria are killed by heat
Pathogens are coated with antibodies/complement to enhance phagocytosis✔️
Viruses enter a cell
DNA is copied

Correct Answer Logic:

It makes the 'prey' (pathogens) easier for the 'predators' (WBCs) to catch.

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General Science and Ability QUESTION #204

Question 17

The waves used for line of sight (LOS) communication are called:

Space waves✔️
Cable waves
Antenna waves
None of these

Correct Answer Logic:

Space waves travel in a straight line from transmitting to receiving antenna.

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Chemistry QUESTION #7405

Question 18

The correct decreasing order of ionic radii among the following isoelectronic species is:

$\text{K}^+ > \text{Ca}^{2+} > \text{Cl}^- > \text{S}^{2-}$
$\text{Ca}^{2+} > \text{K}^+ > \text{S}^{2-} > \text{Cl}^-$
$\text{Cl}^- > \text{S}^{2-} > \text{Ca}^{2+} > \text{K}^+$
$\text{S}^{2-} > \text{Cl}^- > \text{K}^+ > \text{Ca}^{2+}$✔️

Correct Answer Logic:

All are isoelectronic (18 electrons). Decreasing size = increasing nuclear charge:

$\text{S}^{2-}$: Z=16 → largest
$\text{Cl}^-$: Z=17
$\text{K}^+$: Z=19
$\text{Ca}^{2+}$: Z=20 → smallest

Decreasing order: $\text{S}^{2-} > \text{Cl}^- > \text{K}^+ > \text{Ca}^{2+}$

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Education QUESTION #6906

Question 19

According to research on lighting and student learning cited in classroom management principles, which of the following is an evidence-based claim?

All students learn best in brightly lit classrooms; dim classrooms should be avoided
Lighting preferences vary among students; bright light can make some students restless and hyperactive, while others learn best in low light✔️
Fluorescent lighting has no impact on student attention or behavioral outcomes
Natural lighting is always superior to artificial lighting for learning outcomes

Correct Answer Logic:

Research in educational psychology and environmental design indicates that students respond differently to lighting intensity. Some learners are more focused and productive in low-light conditions, while others require bright environments. Importantly, excessive brightness can induce restlessness and hyperactivity in some students — meaning lighting should be considered a flexible management variable, not a fixed setting.

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MBBS QUESTION #10212

Question 20

A patient with gastric carcinoma develops a firm, enlarged left supraclavicular lymph node (Virchow's node/Troisier's sign). This distant metastasis reaches the neck via which lymphatic route?

The thoracic duct, which drains into the venous system at the left venous angle (junction of left subclavian and internal jugular veins)✔️
Direct hematogenous spread only, bypassing the lymphatic system
The right lymphatic duct
Retrograde flow through the inferior vena cava

Correct Answer Logic:

The thoracic duct drains lymph from the abdomen (including gastric lymphatics), lower limbs, and left side of the thorax/head/neck, emptying into the venous system at the left venous angle; malignant cells can travel retrogradely or lodge here, producing the classic left supraclavicular (Virchow's) node in abdominal malignancy.

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