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Physics QUESTION #1058
Question 2241
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 \(27\times10^4\ \text{V/m}\)โœ”๏ธ
  • 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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Correct Answer Logic:
'Comply' means to act in accordance with a wish, order, or rule. 'You must comply with the terms of the contract' is correct. 'Imply' means to suggest something indirectly, which doesn't fit here.
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Reading and Writing (Module-1) QUESTION #5327
Question 2243
Regarding the bioluminescent jellyfish, when does the glow typically occur?
  • When the jellyfish is disturbed by a predator.โœ”๏ธ
  • During the daylight hours.
  • Continuously throughout the night.
  • Only when the water temperature rises.
Correct Answer Logic:
The text specifies the glow happens when the organism is 'disturbed.'
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Chemistry QUESTION #7791
Question 2244

Which is a strong electrolyte in aqueous solution?

  • Acetic acid
  • Ammonium hydroxide
  • Carbonic acid
  • Potassium iodideโœ”๏ธ
Correct Answer Logic:

Strong electrolytes dissociate completely. KI is an ionic salt โ†’ strong electrolyte. Acetic acid, NHโ‚„OH, Hโ‚‚COโ‚ƒ are weak electrolytes.

Uploaded by: Fani Warraich
Boilers Mechanical Engineering QUESTION #4025
Question 2245
'Differential Pressure' across an air filter indicates:
  • The speed of the boiler
  • How clogged or dirty the filter isโœ”๏ธ
  • The temperature of the room
  • The price of the air
Correct Answer Logic:
High 'DP' means the filter needs cleaning or replacement.
Uploaded by: Fani Warraich
The Elections Act 2017 QUESTION #9404
Question 2246
Under Section 4(2), directions or orders issued by the Commission shall be enforceable throughout Pakistan and shall be executed as if issued by:
  • The Supreme Court of Pakistan
  • The Federal Government
  • The High Courtโœ”๏ธ
  • The President of Pakistan
Correct Answer Logic:
Section 4(2) specifically states that such directions shall be executed as if issued by the High Court โ€” not the Supreme Court.
Uploaded by: Fani Warraich
Geography QUESTION #6339
Question 2247
The concept of 'carrying capacity' applied to tourism destinations refers to:
  • Maximum number of tourists that can be accommodated in hotels
  • Maximum number of visitors a site can sustain without unacceptable environmental or social impactsโœ”๏ธ
  • Peak season tourist arrivals
  • Economic threshold for tourism profitability
Correct Answer Logic:
Tourism carrying capacity is the maximum number of visitors a destination can sustain without causing unacceptable deterioration of physical environment, degradation of visitor experience, or adverse impacts on local community.
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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3434
Question 2248
The 'Isoelectric Point' ($pI$) of a protein is the $pH$ at which it:
  • Has a maximum positive charge
  • Has a maximum negative charge
  • Has a net charge of zeroโœ”๏ธ
  • Is most soluble
Correct Answer Logic:
At this $pH$, the protein does not move in an electric field.
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Accounting Finance and Punjab Sales Tax on Services QUESTION #2576
Question 2249
Under section 9(1), when a service is provided over a period of time with periodic payments, how is the service treated for tax purposes?
  • As a single service taxable at the date of first payment
  • As comprising two or more separate and distinct services, each corresponding to the part of the service to which each separate payment relatesโœ”๏ธ
  • The entire service is taxable when the contract is signed
  • Tax is chargeable only upon final completion of the service
Correct Answer Logic:
Section 9(1) treats periodically paid services as COMPRISING TWO OR MORE SEPARATE AND DISTINCT SERVICES, each corresponding to the part to which each separate payment relates. However, section 9(2) clarifies this does NOT apply to services paid on installment basis.
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English QUESTION #8324
Question 2250
Tick the word SIMILAR in meaning to: Dubious
  • certain
  • doubtfulโœ”๏ธ
  • rigorous
  • feeble
Correct Answer Logic:
Dubious means doubtful or uncertain.
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English QUESTION #2698
Question 2251
Select the correctly punctuated possessive form:
  • The childrens' toys are here.
  • The children's toys are here.โœ”๏ธ
  • The childrens toys are here.
  • The childrens's toys are here.
Correct Answer Logic:
'Children' is already plural; to show possession, add 's.
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General Knowledge QUESTION #8767
Question 2252
How many member states are currently in the United Nations (UNO)?
  • 191
  • 192
  • 193โœ”๏ธ
  • 194
Correct Answer Logic:
As of 2025, there are 193 UN member states.
Uploaded by: Fani Warraich
Geography QUESTION #6297
Question 2253
The hydrostatic equation governing vertical pressure gradient in atmospheric science describes which relationship?
  • The barometric law of pressure decrease with altitude
  • The relationship between pressure change with height equaling negative density times gravityโœ”๏ธ
  • The relationship between temperature and pressure in adiabatic processes
  • The geostrophic balance in rotating reference frames
Correct Answer Logic:
The fundamental hydrostatic equation states that pressure change with height equals negative density times gravity. It governs the vertical pressure distribution in the atmosphere under hydrostatic equilibrium.
Uploaded by: Fani Warraich
Civil / Architecture QUESTION #2372
Question 2254
In prestressed concrete design, the concept of the 'load balancing method' (T.Y. Lin's method) involves selecting the tendon profile such that the transverse component of prestress forces:
  • Maximizes the bending moment at midspan to increase the section capacity
  • Exactly balances a chosen portion of the applied gravity loads, resulting in a uniformly stressed (axially loaded) cross-section under the balanced loadโœ”๏ธ
  • Eliminates all tensile stresses in the section at every load level
  • Positions the pressure line (C-line) at the kern point of the section
Correct Answer Logic:
In the load balancing method (T.Y. Lin, 1963), the tendon is profiled (typically parabolic for UDL) so its vertical component exactly counteracts a chosen portion of the gravity load (usually dead load or total service load). Under the balanced load \(w_b = \dfrac{8 P e}{L^2}\), the beam is in pure axial compression with uniform stress \(f = P/A\). Remaining loads (unbalanced) are analyzed by conventional elastic methods.
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Chemistry QUESTION #1009
Question 2255
The molar solubility (\(s\)) of zirconium phosphate with formula \((\text{Zr}^{4+})_3(\text{PO}_4^{3-})_4\) is given by the relation:
  • \(\left(\dfrac{K_{sp}}{9612}\right)^{1/3}\)
  • \(\left(\dfrac{K_{sp}}{6912}\right)^{1/7}\)โœ”๏ธ
  • \(\left(\dfrac{K_{sp}}{8435}\right)^{1/7}\)
  • \(\left(\dfrac{K_{sp}}{5348}\right)^{1/6}\)
Correct Answer Logic:
Dissolution: \(\text{Zr}_3(\text{PO}_4)_4 \rightleftharpoons 3\text{Zr}^{4+} + 4\text{PO}_4^{3-}\). If solubility \(= s\): \([\text{Zr}^{4+}]=3s\), \([\text{PO}_4^{3-}]=4s\). \(K_{sp} = (3s)^3(4s)^4 = 27s^3 \cdot 256s^4 = 6912\,s^7\). So \(s = \left(\dfrac{K_{sp}}{6912}\right)^{1/7}\).
Uploaded by: Fani Warraich
Accounting & Finance QUESTION #6216
Question 2256
In the context of 'Audit Risk', if the Auditor assesses the 'Control Risk' ($CR$) as $1$ (100%), what is the logical implication for the audit strategy?
  • The auditor can reduce the amount of substantive testing
  • The auditor should rely on the internal control questionnaire
  • The auditor must adopt an extensive substantive approachโœ”๏ธ
  • The auditor should issue a modified report immediately
Correct Answer Logic:
If controls are weak ($CR$ is high), the auditor cannot rely on them and must perform extensive testing of transactions and balances (substantive approach).
Uploaded by: Fani Warraich
Boilers Mechanical Engineering QUESTION #2452
Question 2257
For forced vibration isolation to be effective (transmissibility TR < 1), the frequency ratio \(r = p/\omega_n\) must satisfy:
  • \(r < 1\)
  • \(r = 1\)
  • \(r > \sqrt{2}\)โœ”๏ธ
  • \(r > 2\)
Correct Answer Logic:
Isolation requires TR < 1, which occurs when \(r=p/\omega_n>\sqrt{2}\). This means the machine operating speed \(p\) must exceed \(\sqrt{2}\) times the mounted natural frequency \(\omega_n\).
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Law QUESTION #9680
Question 2258
Under Article 38, a confession made to a police officer:
  • Is admissible with corroboration
  • Is admissible if made voluntarily
  • Shall not be proved as against the accusedโœ”๏ธ
  • Is admissible if witnessed by a Magistrate
Correct Answer Logic:
Article 38 categorically states that no confession made to a police officer shall be proved as against a person accused of any offence.
Uploaded by: Fani Warraich
Correct Answer Logic:
\(\dfrac{3}{11} \times x = 22 \Rightarrow x = \dfrac{22 \times 11}{3} = \dfrac{242}{3}\)
\(\dfrac{6}{11} \times x = 2 \times 22 = 44\) (since \(\dfrac{6}{11}\) is double \(\dfrac{3}{11}\))
Uploaded by: Fani Warraich
Psychology QUESTION #9809
Question 2260
The term 'phenomenology' refers to:
  • A science of perception
  • Detailed analysis of our sensations
  • A naive description of our immediate experiencesโœ”๏ธ
  • Scientific study of queer occurrences
Correct Answer Logic:
Phenomenology (Husserl, Merleau-Ponty) involves describing conscious experience as directly lived โ€” a presuppositionless account of immediate subjective experience. It is foundational to humanistic and existential psychology.
Uploaded by: Fani Warraich