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Federal (FBISE) · FBISE HSSC-I science paper (new 50% MCQ pattern) · Free

1st Year Physics Board Pattern Paper 2026

80 marks · 3 hours (Section A: 1 hour 40 minutes) · 98 questions. Covers: 14 chapters (01. Physical Quantities & Measurement to 14. Particle Physics).

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1st Year Physics Board Pattern Paper 2026

1st Year · Physics · Federal (FBISE)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 80Time: 3 hours (Section A: 1 hour 40 minutes)

Q1. Multiple choice questions (Attempt all · 80 × 0.5 = 40)

  1. Dimension of universal gravitational constant is.
    1. [M⁻²L³T⁻²]
    2. [M³L⁻¹T⁻²]
    3. [M⁻¹L³T⁻²]
    4. [M⁻³L³T⁻²]
  2. The magnetic field around a long straight current-carrying conductor is in the form of:
    1. Straight lines
    2. Concentric circles
    3. Parabolic curves
    4. Random loops
  3. Electric field is related to potential gradient by:
    1. E = qΔV
    2. E = Δr/ΔV
    3. E = -ΔV/Δr
    4. E = V/r
  4. Ideal gas molecules exert force on each other only during:
    1. Free expansion
    2. Collision
    3. Heating
    4. Cooling
  5. If size (length) of the wings of a fan is increased, its rotational speed, for the same voltage and current, will
    1. increase
    2. decrease
    3. may increase or decrease
    4. remain constant
  6. The odd force from the following is
    1. gravitational force
    2. elastic force
    3. frictional force
    4. electric force
  7. Vector product of two parallel vectors is:
    1. AB
    2. AB sin 90°
    3. Zero
    4. Undefined
  8. What is the force experienced by a projectile after the initial force that launched it into the air in the absence of air resistance?
    1. The gravitational force
    2. The nuclear force
    3. The contact force
    4. The electromagnetic force
  9. The first postulate of special relativity states that the laws of physics are same in:
    1. All accelerating frames
    2. All inertial frames
    3. All rotating frames
    4. All gravitational fields
  10. Drift velocity is produced when
    1. No electric field exists
    2. A potential difference is applied
    3. Temperature decreases
    4. Conductor is cooled
  11. The equation of continuity is based on the law of:
    1. Conservation of momentum
    2. Conservation of mass
    3. Conservation of energy
    4. Conservation of velocity
  12. Work done from force-extension graph is equal to
    1. slope of graph
    2. perimeter of graph
    3. area under graph
    4. maximum height
  13. Which particle gives mass to matter according to Higgs?
    1. Photon
    2. Gluon
    3. Higgs boson
    4. Z-boson
  14. In Doppler's effect formula, vs represents:
    1. Speed of listener
    2. Speed of sound
    3. Speed of source
    4. Speed of medium
  15. The diameter of the Earth is approximately:
    1. 10⁹ m
    2. 10⁷ m
    3. 10¹² m
    4. 10⁴ m
  16. The combined electric and magnetic force acting on a charged particle is called:
    1. Fleming force
    2. Coulomb force
    3. Lorentz force
    4. Maxwell force
  17. If two points are at same potential, are there any electric field lines connecting them?
    1. Yes
    2. No
    3. May or may not
    4. Insufficient information.
  18. Maximum work is obtained by the process called:
    1. Isochoric
    2. Isothermal
    3. Isobaric
    4. Adiabatic
  19. Angular momentum for a rigid body is:
    1. L = Iω
    2. L = Iα
    3. L = mω
    4. L = mv²
  20. Negative work occurs when:
    1. Force is perpendicular to displacement
    2. Force is in same direction as displacement
    3. Force is opposite to displacement
    4. Force is zero
  21. A physical quantity that has both magnitude and direction is called:
    1. Scalar
    2. Vector
    3. Constant
    4. Unit quantity
  22. A body starting from rest means:
    1. vᵢ = 0
    2. v𝒻 = 0
    3. a = 0
    4. t = 0
  23. A frame of reference that is at rest or moving with uniform velocity is called a:
    1. stationary frame
    2. inertial frame
    3. non-inertial frame
    4. rotational frame
  24. Kirchhoff's Current Law states that:
    1. Sum of voltages in a circuit is zero
    2. Voltage is constant
    3. Current is same everywhere
    4. Sum of currents entering a junction equals sum leaving
  25. In streamline flow, the velocity of particles at a point is:
    1. Always different
    2. Zero
    3. Same
    4. Infinite
  26. Polycrystalline solids consist of
    1. one large crystal
    2. many small crystals with random orientation
    3. fluid layers
    4. only amorphous particles
  27. The Higgs field gives mass to
    1. all elementary particles
    2. only photons
    3. only electrons
    4. only quarks
  28. High frequency sound waves bounce off blood and are used in:
    1. MRI
    2. Echocardiography
    3. X-ray
    4. ECG
  29. Which of the following is a dimensional variable?
    1. Angle
    2. Strain
    3. Length
    4. Coefficient of friction
  30. When the angle between velocity and magnetic field is neither 0°, 90°, nor 180°, the particle moves in a:
    1. Circular path
    2. Straight path
    3. Helical path
    4. Zig-zag path
  31. Inside a Faraday cage, the electric field is:
    1. Maximum
    2. Zero
    3. Variable
    4. Constant
  32. The average kinetic energy of gas molecules depends on temperature only.
    1. Pressure
    2. Volume
    3. Density
    4. Temperature
  33. The term mr² represents:
    1. Torque
    2. Angular momentum
    3. Moment of inertia
    4. Linear inertia
  34. SI unit of work is:
    1. Watt
    2. Joule
    3. Newton
    4. Pascal
  35. Scalar product of antiparallel vectors is:
    1. Negative
    2. Positive
    3. Zero
    4. Undefined
  36. The horizontal velocity of a projectile is:
    1. Constant
    2. Increasing
    3. Decreasing
    4. Zero
  37. Minkowski space combines:
    1. Time with three spatial dimensions
    2. Time with mass
    3. Time with energy
    4. Length with velocity
  38. In the potentiometer equation E2 = (l2/l1) E1, the quantities l1 and l2 represent
    1. Current
    2. Resistances
    3. Balancing lengths
    4. Time intervals
  39. If density remains constant for steady flow, then ρ₁ = ρ₂ and continuity becomes:
    1. A₁ + v₁ = A₂ + v₂
    2. A₁/A₂ = v₁/v₂
    3. A₁v₁ = A₂v₂
    4. A₁v₁² = A₂v₂²
  40. Crystalline solids have
    1. sharp melting point
    2. broad melting range
    3. no melting point
    4. variable melting behaviour
  41. Which force binds quarks inside hadrons?
    1. Electromagnetic force
    2. Gravitational force
    3. Weak nuclear force
    4. Strong nuclear force
  42. Formula of intensity in terms of power is:
    1. I = PA
    2. I = P/A
    3. I = A/P
    4. I = Pt/A
  43. The mean diameter of a wire is found to be (0.50±0.02) mm. The percentage uncertainty in the diameter is.
    1. 0.02
    2. 0.04
    3. 0.06
    4. 0.08
  44. Which of the following particle in motion cannot be deflected by magnetic field?
    1. Electron
    2. Proton
    3. Alpha-particle
    4. Neutron
  45. A charge +q placed in an electric field experiences a force:
    1. Opposite to E
    2. Along the direction of E
    3. Perpendicular to E
    4. Zero
  46. Charles's law graph between volume and temperature is
    1. Curved
    2. Parabolic
    3. Straight line
    4. Zig-zag
  47. 1 radian is equal to:
    1. 90°
    2. 180°
    3. 57.3°
    4. 360°
  48. Which of the following is a conservative field?
    1. Frictional field
    2. Gravitational field
    3. Viscous field
    4. Air resistance field
  49. The cross product of two vectors A and B is equal to:
    1. AB cos θ
    2. AB sin θ n̂
    3. A/B
    4. 0 always
  50. During an explosion, the total momentum before explosion is:
    1. Maximum
    2. Equal to final
    3. Zero
    4. Cannot be determined
  51. Value of speed of light (c) is approximately:
    1. 3×10² m/s
    2. 3×10⁵ m/s
    3. 3×10⁸ m/s
    4. 3×10¹⁰ m/s
  52. A potentiometer works on the principle of
    1. Heating effect
    2. Null method
    3. Resonance
    4. Magnetic induction
  53. The Venturi meter works on which principle?
    1. Conservation of mass
    2. Bernoulli's principle
    3. Archimedes' principle
    4. Pascal's law
  54. Body-centred cubic (BCC) unit cell contains atoms at
    1. only corners
    2. only centre
    3. corners and centre
    4. face centres
  55. Which particle is exchanged between quarks?
    1. Photon
    2. Gluon
    3. Electron
    4. Neutrino
  56. Which type of light is reduced to half after passing through one Polaroid?
    1. Laser light
    2. UV light
    3. Infrared light
    4. Unpolarized light
  57. Dimensional analysis cannot be used to derive formulas involving:
    1. Logarithms
    2. Velocity
    3. Acceleration
    4. Force
  58. A charged particle moves in a circular path when:
    1. v ⟂ B
    2. v ∥ B
    3. v ∝ B
    4. v = 0
  59. The region between opposite charges where field is strong is due to:
    1. Low density of lines
    2. No field
    3. Circular lines
    4. High density of lines
  60. The equation PV = NkT relates pressure, volume, and temperature with:
    1. Boltzmann constant
    2. Avogadro's number
    3. Molar mass
    4. Molecular size
  61. On a frictionless banked road, centripetal force is provided by:
    1. Friction
    2. Weight
    3. Normal force
    4. Air resistance
  62. Work done around a closed path in a conservative field is:
    1. Positive
    2. Negative
    3. Zero
    4. Infinite
  63. If a vector A makes angle θ with the horizontal, its x-component Ax is:
    1. A sin θ
    2. A tan θ
    3. A cos θ
    4. A/ sin θ
  64. A light object hitting a heavy object at rest usually:
    1. Stops moving
    2. Rebounds with the same speed
    3. Moves faster
    4. Breaks apart
  65. An inertial frame of reference is the one.
    1. Which is at rest.
    2. Which is moving with a uniform velocity along a straight line.
    3. Which has zero acceleration.
    4. All of these
  66. Which one of the following electrical devices helps us to measure the accurate value of emf?
    1. meter Bridge
    2. voltmeter
    3. multimeter
    4. potentiometer
  67. In a paratrooper's jump, the parachute slows him down because:
    1. Weight increases
    2. Drag force increases
    3. Gravity decreases
    4. Air becomes denser
  68. Crystalline solids have particles arranged in a
    1. random pattern
    2. fluid-like arrangement
    3. irregular arrangement
    4. regular
  69. According to string theory, forces like electromagnetism arise from
    1. quarks
    2. vibrations of strings
    3. molecules
    4. photons only
  70. Which law gives intensity of transmitted polarized light?
    1. Snell's law
    2. Malus's law
    3. Newton's law
    4. Bernoulli's law
  71. The difference between true value and observed value is called:
    1. Uncertainty
    2. Precision
    3. Error
    4. Accuracy
  72. The formula for magnetic force on a conductor in a magnetic field is:
    1. F = IBL
    2. F = BIL sinθ
    3. F = BI/L
    4. F = L/B
  73. The strength of electric field is proportional to:
    1. Number of field lines per unit area
    2. Mass of the charge
    3. Distance squared
    4. Temperature
  74. According to first law of thermodynamics, when heat is added to the system,
    1. Internal energy decreases
    2. Work must be zero
    3. Internal energy increases
    4. No energy change occurs
  75. Centripetal acceleration direction is always:
    1. Tangential to the circle
    2. Away from center
    3. Toward the center
    4. Downward
  76. Work is positive when the angle between force and displacement is:
    1. 0° to 90°
    2. 90° to 180°
    3. 180° to 270°
    4. 270° to 360°
  77. The y-component of a vector making angle θ is:
    1. A sin θ
    2. A cos θ
    3. A tan θ
    4. A cot θ
  78. Two equal masses colliding elastically exchange:
    1. Directions only
    2. Velocities
    3. Accelerations
    4. Energies
  79. Length of a moving object becomes:
    1. Larger
    2. Shorter
    3. Stays the same
    4. Infinite
  80. The SI unit of resistivity is:
    1. Ohm
    2. Ohm-meter
    3. Siemens
    4. Coulomb

Q2. Short questions (Attempt all. Each question has an OR choice · 7 × 4 = 28)

  1. What happens to the energy transferred by a wave as its amplitude increases?

    OR

    Why is the initial momentum zero during an explosion?
  2. State one use of annihilation in particle accelerators.

    OR

    What are two ways weightlessness can be achieved?
  3. What is meant by ideal gas equation?

    OR

    What is meant by electric potential energy?
  4. Write the formula for maximum power output.

    OR

    What are the postulates of special relativity?
  5. What is meant by irrotational flow?

    OR

    Write the formula for work done by constant force.
  6. Why does a wire extend when load is applied?

    OR

    What is the direction of A × B?
  7. When do two current-carrying wires attract each other?

    OR

    How do you find uncertainty in a timing experiment?

Q3. Long questions (Attempt all. Each question has an OR choice · 2 × 6 = 12)

  1. What is meant by frames of reference? Explain with the help of examples. Also discuss its types.

    OR

    Explain Kirchhoff’s first law and describe that it is a consequence of conservation of charge.
  2. Explain the asymmetry of matter and anti-matter in the universe.

    OR

    A particle carrying a charge of 1μC and moving with velocity of 2 x 10⁶ m/s enters in a magnetic field of 0.5 T at angle of 60º with the field. Calculate the magnitude of magnetic force acting on it.