LECTURER PHYSICS PAST PAPER 03-06-2023 BY SPSC
Lecturer Physics 25 years Past Papers Click here
چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
- Solid
- Financially stable
- Metaphysically correct
- Both A and B
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Insolvent means دیوالیہ
- Financially stable مالی استحکام
- Solid means مالیاتی تناظر میں مالی طور پر درست
Last verified on 05-08-2026
- Is fundamentally different than mass
- And mass are closely related
- Equals mass moving at the speed of the light square
- None of these
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Explanation
- Einstein's equation E=mc² shows that mass can be converted into energy and vice versa.
- c: Speed of light = 299,792,458 m/s (≈ 3×10⁸ m/s)
- E: Energy
- m: Mass
- It was proposed by Albert Einstein in 1905 as part of the Special Theory of Relativity.
Last verified on 28-07-2026
اوور ڈیمپنگ کا نتیجہ کیا ہوتا ہے؟
- Slower return to equilibrium
- Faster return to equilibrium
- Equilibrium is never achieved
- Unrhythmic to equilibrium
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Explanation
- Over-damping occurs when damping force is very large.
- The system returns to equilibrium without oscillating.
- Because of strong resistance, motion becomes very slow.
- It takes more time compared to critical damping.
Last verified on 05-06-2026
الفا پارٹیکل کی وہ اوسط دوری جو وہ ہوا میں طے کرتا ہے جب تک اس کی آئنائزنگ طاقت ختم نہ ہو جائے، اسے کیا کہتے ہیں؟
- Trajectory
- Range
- Firing level
- Limit
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Explanation
- The average distance covered by an alpha particle in air before losing its ionizing power is called its range.
- Alpha particles lose energy continuously while moving through air.
- They stop ionizing after traveling a certain distance.
- This stopping distance is not straight-line path always due to collisions.
Last verified on 05-06-2026
ایک دوہری کے دوران ، _____ کے ذریعہ دوئم کے مرحلے میں تبدیلی آتی ہے؟
- π⁄2 rad
- π rad
- 2π rad
- None of these
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Explanation
In one complete oscillation (one full cycle), the phase of an oscillating system changes by radians.This corresponds to the system returning to its starting position in a periodic motion, such as simple harmonic motion.
ٹرانسفارمر کا اصول _____ ہے؟
- Mutual induction
- Ampere's law
- Motional e.m.f
- None of these
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Explanation
A transformer works on the principle of mutual induction, where a changing current in the primary coil induces a voltage in the secondary coil.This is based on Faraday's Law of Electromagnetic Induction, which states that a changing magnetic field produces an electromotive force (emf).
امپیر کے قانون میں ، انضمام ______ سے زیادہ ہے؟
- Surface
- Closed path
- Closed surface
- None of these
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Explanation
Ampere's law states that the line integral of the magnetic field around a closed path is proportional to the total current enclosed.Mathematically, , where the integral is taken over a closed loop (path).
ایک ریوسٹاٹ کو _____ کے طور پر استعمال کیا جاسکتا ہے؟
- Potential divider
- Variable resistor
- Both A and B
- None of these
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Explanation
A rheostat is a type of variable resistor used to control current in a circuit.It can also function as a potential divider by adjusting voltage across components.
اینٹروپی میں تبدیلی _____ کے لئے صفر ہے؟
- Reversible isobaric processes
- Reversible adiabatic processes
- Reversible isothermal processes
- None of these
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Explanation
In a reversible adiabatic process, no heat is exchanged with the surroundings (Q = 0), so the change in entropy (ΔS) is zero.Entropy change is linked to heat transfer, and since no heat enters or leaves, entropy remains constant.
- Steadfast
- Prudent
- Skeptic
- Wasteful
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Prodigal means فضول خرچ
Recklessly Wasteful means فضول خرچ
Profligate means منافع
