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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
زمین کی سطح سے فرار کی رفتار ______ ہے؟
9.1 km/sec
11.2 km/sec
1.7 km/sec
None of these
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Explanation
Escape velocity is the minimum speed required for an object to escape Earth's gravitational field without further propulsion. On Earth , this velocity is 11.2 km/s . It calculated using the formula vₑ = √(2GM/R) , where G is the gravitational constant, M is Earth's mass, and R is its radius.
کونیی رفتار ______ کے تحت محفوظ ہے؟
Uniform force
Central force
Variable force
None of these
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Explanation
Angular momentum is conserved when no external torque acts on a system. A central force (like gravitational or electrostatic force) always acts along the line joining the object and the center . It producing no torque , thus conserving angular momentum.
De-Broglie
Einstein
Hygen
None of these
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Explanation
Louis de Broglie proposed the wave-particle duality of matter. It stating that particles like electrons exhibit wave-like properties .His equation λ = h/p (where λ is wavelength, h is Planck’s constant, and p is momentum) describes the matter waves concept.
گونج پر ، مندرجہ ذیل میں سے کون زیادہ سے زیادہ ہے؟
Amplitude
Frequency
Wavelength
None of these
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Explanation
Resonance occurs when a system vibrates at its natural frequency due to an external periodic force. At resonance, amplitude reaches its maximum value because the energy transfer is most efficient.
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.
جس عمل میں دباؤ مستقل رہتا ہے اسے ______ کہا جاتا ہے؟
Isobaric
Isothermal
Adiabatic
None of these
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Explanation
“Iso-” means constant; “baric ” relates to pressure .
In an isobaric process , pressure remains unchanged .
Volume or temperature can change during the process.
Examples: heating a gas in a piston-cylinder system a t constant atmospheric pressure.
Isochoric = constant volume, isothermal = constant temperature, adiabatic = no heat transfer.
Last updated question 25 feb 2026
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.
گیس کا دباؤ براہ راست ______ متناسب ہے؟
Wind energy
Potential energy
Kinetic energy
None of these
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Explanation
According to the Kinetic Theory of Gases , gas pressure is caused by the collisions of molecules with container walls, which depend on their kinetic energy .Higher kinetic energy (due to increased temperature) leads to more forceful and frequent collisions, raising the pressure of the gas.
The Ants
The Camels
The Goats
None of these
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Explanation
Surah An-Naml is the 27th chapter of the Quran.
The surah titled in English means “The Ants”.
The bird Hudhud (hoopoe) appears twice in Surah An-Naml.
Surah Al Naml of the holy Quran Bismillah is added
to t he entire Bismillahir Rahmani Raheem in the 30th verse .
This is why Surah Naml is known as the Surah with two bismillahs.
Surah Naml is an earlier "Meccan surah".
Yielding
Rigid
Movable
Supply
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Explanation
Elastic means لچکدار
Rigid means غیر لچکدار
