Welcome to Physics Initial Test 2, an advanced online practice module designed specifically for candidates preparing for the initial academic tests of the Pakistan Armed Forcesβincluding Pakistan Air Force (PAF) (GDP, CAE, Aeronautical Engineering, Airmen), Pak Army (Technical Cadet Course – TCC), and Pak Navy (PN Cadet, Operations, Engineering Branches).
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#1. Which of the following is not the unit of time?
#2. One micron is equivalent to
#3. The mass of electron in Me V is
#4. The ratio of nuclear magneton and Bohr magneton is
#5. The value of Faraday number in SI unit is
#6. The velocity of ripples on water surface depends upon the wavelength Ξ» , density of water d and acceleration due to gravity g. Which of the following relation is correct among these quantities?
#7. The fundamental unit of the quantity of matter is
#8. Relation between range and maximum range is
#9. In an inelastic collision
#10. Viscosity of air is
#11. The viscosity of water is
#12. For the steady flow of incompressible fluid, the equation of continuity is given by
#13. The viscosity of glycerine is
#14. For a point source of light the wave front produced are
#15. In thin film Colours are due to
#16. Bending of light around sharp edges is known as
#17. Michelson interferometer is based upon
#18. The wave length of X-rays is of the order of
#19. A particle is moving such that its acceleration is represented by the equation a= – bx, where x is its displacement from mean position and b is a constant
#20. n-type Germanium is obtained on doping intrinsic Germanium by
#21. A simple pendulum is released when ΞΈ = Ο /6. the time period of oscillation is
#22. If identical springs of spring constant K are connected in series and then parallel combinations. A mass m is suspended from them. The ratio of their frequencies for vertical oscillations will be
#23. The maximum displacement of a particle executing SHM from its mean position is 2 cm and its time period is 1 s. the equation of its displacement will be
#24. The dimension of elastic modulus
#25. Solids having partially field conduction bands are
#26. Domains are present only in
#27. At what temperature does the mean kinetic energy of hydrogen atoms increase to such an extent that they will escape out of the gravitational field of earth forever?
#28. An astronaut carries with him a cylinder of capacity 10 litre filled with nitrogen gas at temperature 27Β°C and pressure 50 atmosphere. He makes hole of area 1 cm^2 in it. In how much time will it be emitted?
#29. The energy released in fission reaction is
#30. Which of the following pairs represent units of the same physical quantity?
#31. The ratio of specific heat capacity to molar heat capacity of a body
#32. The colour of light emitted by a LED depends on
#33. A diode characteristic curve is a plot between
#34. Breakdown voltage in a p-n diode is
#35. If current “I” flows steadily through a resistor “R” for time “t” then heat energy supplied to the system can be defined as
#36. In case of generator
#37. A d.c. Voltage supply has an internal resistance of r Ξ©. A resistive load R is connected across the terminals of the supply. The power developed in R is maximum when R (in ohm) is
#38. Eddy currents do not cause
#39. Energy stored per unit volume inside a long solenoid is known as
#40. Slip rings are used in
#41. X-rays are affected by
#42. Balmer series lies in
#43. In energy level diagram horizontal lines show
#44. The concentration of Neon in He-Ne laser is
#45. SI unit of decay constant
#46. Quenching gas in Geiger Counter
#47. Solid state detector are used in ________ mode
#48. In a nuclear reaction, which conservation law holds:
#49. Pick out the INCORRECT statement
#50. Dimension of impulse is same as that of
πππππππππ
ππππππππππππππ
πππππππππ
PHYSICS INITIAL TEST 2
Welcome to Physics Initial Test 2, an advanced online practice module designed specifically for candidates preparing for the initial academic tests of the Pakistan Armed Forcesβincluding Pakistan Air Force (PAF) (GDP, CAE, Aeronautical Engineering, Airmen), Pak Army (Technical Cadet Course – TCC), and Pak Navy (PN Cadet, Operations, Engineering Branches). This practice quiz focuses on circular motion, Simple Harmonic Motion (SHM), fluid dynamics, wave optics, and high-frequency multiple-choice questions needed to clear your computer-based military exam with distinction.
Key Topics Covered in Physics Initial Test 2
To secure top marks in the Physics academic paper during your Armed Forces selection test, make sure to thoroughly revise these core physical concepts assessed in this module:
- Circular Motion & Gravitation: Angular displacement, angular velocity, centripetal acceleration, centripetal force, and artificial satellite mechanics.
- Simple Harmonic Motion & Oscillations: Mass-spring systems, simple pendulum dynamics, energy conservation in SHM, and resonance phenomena.
- Fluid Dynamics & Bernoulli’s Principle: Continuity equation, fluid flow speed, pressure distribution, and drag force applications.
- Wave Motion & Physical Optics: Wave propagation, superposition principle, interference, diffraction, and Doppler effect fundamentals.
High-Frequency Sample MCQs for Practice
Test your understanding with these representative Physics MCQs frequently asked in tri-services academic tests:
1. The angular velocity of the second hand of a watch is:
A) $\pi/30 \text{ rad/s}$
B) $\pi/60 \text{ rad/s}$
C) $2\pi \text{ rad/s}$
D) $\pi/180 \text{ rad/s}$
Answer: A) $\pi/30 \text{ rad/s}$
2. The time period of a simple pendulum depends primarily on its:
A) Mass of the bob
B) Length of the pendulum
C) Amplitude of vibration
D) Material of the bob
Answer: B) Length of the pendulum
3. According to Bernoulli’s equation, where the velocity of a fluid is high, the pressure is:
A) High
B) Low
C) Zero
D) Constant
Answer: B) Low
4. The phenomenon of interference demonstrates that light is a:
A) Particle
B) Wave
C) Longitudinal wave
D) Scalar quantity
Answer: B) Wave
5. When a source of sound moves towards a stationary listener, the observed frequency:
A) Decreases
B) Increases
C) Remains unchanged
D) Drops to zero
Answer: B) Increases
6. What is the acceleration of a body executing simple harmonic motion at its mean position?
A) Maximum
B) Zero
C) Infinite
D) Half of maximum
Answer: B) Zero
7. The maximum work done by a centripetal force on a revolving body in one complete revolution is:
A) $2\pi r F$
B) Zero
C) $F \cdot r$
D) $m v^2 / r$
Answer: B) Zero
Detailed Overview of Physics Initial Test 2 Preparation
Preparing for Physics Initial Test 2 requires a clear understanding of rotational mechanics and wave behavior. In military selection centers, the computer-based Physics paper evaluates both conceptual understanding and rapid formula application. Regular practice with structured questions helps improve problem-solving speed, master wave motion equations, and gain full confidence for test day.
Effective Revision Tips for Test 2
- Master Centripetal Formulas: Learn how work done by centripetal force is always zero due to perpendicular displacement.
- Review Doppler Effect Conditions: Memorize the frequency shift formulas for approaching and receding observers and sources.
- Practice Timed Quizzes: Solve questions under timed conditions to adapt to the time constraints of military selection computer tests.
Useful Resources & Next Steps
- Next Quiz: Practice Physics Initial Test 3
- Main Hub: Access All Forces Academic Online Quizzes
- Official Websites:
Physics Academic Test Preparation: Newton’s Laws of Motion & Friction
Dynamics, Inertia, Momentum Conservation & Frictional Forces
Dynamicsβthe study of forces and the causes of motionβis foundational for military recruitment tests. Newton’s three laws of motion, momentum conservation, tension in strings, and frictional resistances are standard topics in FSc pre-engineering and pre-medical physics curricula. Candidates must be able to solve quick conceptual dilemmas regarding inertia, action-reaction pairs, and friction coefficients.
Always remember that action and reaction forces act on different bodies, which is why they do not cancel each other out to produce zero net force on a single system.
Key Topics Covered in Physics Quiz 2
- Newton’s First Law (Law of Inertia): Conceptual understanding of mass as a measure of inertia. Inertia of rest, motion, and direction.
- Newton’s Second Law of Motion: Force, momentum, impulse, and the quantitative relationship $F = \frac{\Delta p}{\Delta t}$ or $F = ma$. Solving basic tension and pulley system problems.
- Newton’s Third Law and Momentum Conservation: Action-reaction forces, recoil of guns, rocket propulsion principles, and collision conservation laws (elastic vs. inelastic collisions).
- Friction and Its Applications: Static vs. kinetic friction coefficients ($\mu_s$ and $\mu_k$), angle of friction, angle of repose, and motion of bodies on inclined planes.
Friction & Momentum Equations
- Maximum Static Friction: $f_s(\text{max}) = \mu_s \cdot R$ (where $R = mg$ on horizontal surfaces)
- Impulse: $J = F \cdot \Delta t = \Delta p$
Take Physics Quiz 2 below to test your command over dynamics and friction concepts under timed conditions.