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Punjab (PTB) · 1st Year Physics paper scheme (Punjab boards) · Free

1st Year Physics Board Pattern Paper 2026

85 marks · 3 hours · 55 questions. Covers: 12 chapters (CHAP 1: Measurements to CHAP 12: Nuclear and Particle Physics).

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1st Year Physics Board Pattern Paper 2026

1st Year · Physics · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 85Time: 3 hours

Q1. Multiple choice questions (Attempt all · 17 × 1 = 17)

  1. If fingers of right hand show the direction of magnetic field and palm shows the direction of force, then thumb points for:

    1. Torque

    2. Voltage

    3. Current

    4. Inducted

  2. Work has dimensions like:

    1. Torque

    2. Momentum

    3. Velocity

    4. Power

  3. The resistance of an LDR:

    1. Increases with increase in light intensity

    2. Decreases with decrease in light intensity

    3. Remains constant regardless of light

    4. First increases then decreases

  4. In the superposition of waves, interference is said to be constructive when the waves:

    1. Are of different types

    2. Are exactly out of phase

    3. Arrive at a point with crest meeting crest

    4. Travel in opposite directions

  5. The quantity which remains constant in the equation of continuity is:

    1. Volume

    2. Mass flow rate

    3. Pressure

    4. Area

  6. Which of the following is a derived quantity?

    1. Force

    2. Mass

    3. Length

    4. Time

  7. A frame of reference that is accelerating w.r.t. an inertial frame is called:

    1. Inertial

    2. Stationary

    3. Non-inertial

    4. Rotational

  8. The anti-particle of electron is:

    1. Proton

    2. Positron

    3. Neutrino

    4. Anti-proton

  9. Which quantity of the following is dimensionless?

    1. Angular velocity

    2. Angular acceleration

    3. Centripetal force

    4. Angular displacement

  10. At constant temperature, the kinetic theory of gases leads to:

    1. Boyle's law

    2. Charles law

    3. Avogadro's law

    4. Joseph Lussat's law

  11. Malu's law deal with:

    1. Intensity of reflected light

    2. Intensity of polarized light passing through an analyzer

    3. Frequency of light

    4. Wavelength of polarized light

  12. If cross product of two vectors x points along positive z-axis, then the vectors  and  must lie in:

    1. yz-plane

    2. xz-plane

    3. zy-plane

    4. No plane

  13. Which force balance the magnetic attraction to prevent ferrofluids from settling?

    1. Buoyant force

    2. Brownian motion

    3. Electrostatic repulsion

    4. Gravitational pull

  14. A ball is thrown upward. As it rises, its:

    1. K.E. increases, P.E. decreases

    2. K.E. decreases, P.E. increases

    3. Both K.E. and P.E. increases

    4. Both K.E. and P.E. remain constant

  15. Kirchhoff's first rule is the manifestation of the law of conservation of:

    1. Mass

    2. Charge

    3. Energy

    4. Momentum

  16. When sound waves diffract around an object, what is observed?

    1. The sound bends and can be heard even behind the object

    2. The sound is completely blocked

    3. The sound gets louder

    4. The frequency of the sound increases

  17. The upthrust acting on a floating object is equal to:

    1. Volume of the object

    2. Density of the fluid

    3. Weight of the object

    4. Volume of water displaced

Q2. Short questions (Attempt any 8 of 12 · 8 × 2 = 16)

  1. What is thrust?

  2. Banked tracks are needed for turns on higway. why?

  3. Is work done by a variable force always positive?

  4. Differentiate between dimensional and non-dimensional constant.

  5. Can a vector have a component greater than the vector's magnitude?

  6. What is weightlessness?

  7. A ball of mass m is held at a height h1 above a table. The table top is at a height h2 above the floor. One student says that the ball has potential energy mgh 1 but another says that it is mg (h1+h2). Whi is correct?

  8. How uncertainty can be reduced in a timing experiment?

  9. Describe the circumstances for which velocity and acceleration of a vehicle are: (i) v is zero but a is not zero, (ii) a is zero but v is not zero. (iii) perpendicular to one another.

  10. Mass is a measure of inertia in linear motion. What is its analogue in rotational motion? Describe briefly.

  11. A body is being raised to a height H from surface of the Earth. What is the sign of work done by both (body and the Earth)? Justify.

  12. How many nano seconds in 1 year?

Q3. Short questions (Attempt any 8 of 12 · 8 × 2 = 16)

  1. What are the factors which speed of sound in air depends?

  2. What is plane polarized light?

  3. Explain how thermodynamics applies to biological systems, such as human body.

  4. Does velocity remain constant along a streamline in steady flow?

  5. What is coherent light?

  6. What are the applications of Brewster's angle?

  7. A gas is expanding adiabatically. Explain what happens to temperature and pressure of the gas.

  8. How does pressure changes with depth in fluids?

  9. Is it possible for two identical waves travelling in the same direction along a strin to give rise to a stationary wave?

  10. Write down some applications of plane polarized.

  11. Give two examples of adiabatic process.

  12. When pure water fall on a flat glass plate. It spread on the plate while mercury. when falls on the same plate gets converted into small globules. why?

Q4. Short questions (Attempt any 6 of 9 · 6 × 2 = 12)

  1. What are the two postulates of special theory of relativity?

  2. What is meant by zero electric potential?

  3. What is the effect of beta plus decay on the nucleus?

  4. Is it possible to change both the area of the loop and the magnetic field passing through the loop and still not have an induced emf in the loop? Give reason.

  5. Can an object with mass travel at the speed of light?

  6. What factors affect the resistivity of a meterial?

  7. State the role of Higgs Boson in the generation of mass in modern physics theories.

  8. How does Lenz' law obey the law of conservation of energy?

  9. What is a relative motion?

Q5. Long questions (Attempt any 3 of 5 · 3 × 8 = 24)

  1. A Carnot engine is operating between a high temperature reservoir at 600 k and a low temperature reservoir at 300 K. Calculate: (i) the maximum possible efficiency (ii) the amount of work output if the engine absorb 500 j of heat from the high temperature reservoir.

  2. We wish to use a glass plate of refractive index of 1.5 in air as a polarizer. Find the polarizing angle and angle of refraction.

  3. Explain how ferrofluids work?

  4. Justify that mass remains conserved when a fluid flows through a pipe.

  5. What is relative motion? How does it differ from absolute motion? Explain.