Punjab Physics 2022 Paper 1 — Solved Past Paper with Answers

Q1. e-mass Of Orkdroplet in measuring charge in Millikan method is calculated by:

• A. Stokes’s Law✓
• B. Columbs Law
• C. Newton's Gravitational Law
• D. Faraday's Law

Explanation: Explanation will be added soon

Q2. Capacitance of parallel plate capacitor can be increased by:

• A. Decreasing area of plates✓
• B. increasing potential
• C. Inserting dielectric material
• D. increasing separation between plates

Explanation: Explanation will be added soon

Q3. Thermistors with negative temperature coefficient are very accurate for measuring: (A) Room temperature (B) Hi (C) Low temperature 100K (D) Low temperature 10K

• A. Room temperature✓
• B. High Temperature
• C. Low temperature 100K
• D. Low temperature 10K

Explanation: Explanation will be added soon

Q4. Range of voltmeter can be increased by:

• A. increasing high resistance
• B. Decreasing high resistance
• C. Increasing full scale deflection current
• D. Changing resistance of coil✓

Explanation: Explanation will be added soon

Q5. Pyincipte-of galvanometer is same as:

• A. D.C motor✓
• B. A.C motor
• C. Transformer
• D. Generator

Explanation: Explanation will be added soon

Q6. The principle of transformer is:

• A. Conservation of energy✓
• B. Momentum conservation
• C. Mutual induction
• D. Conservation of charge

Explanation: Explanation will be added soon

Q7. ForA.C generator J = J, sin(2a ft.)- instantaneous current at f = 1, is:

• A. zero
• B. I○✓
• C. I○/2
• D. I○/2

Explanation: Explanation will be added soon

Q8. When a capacitor is connected to A.C source how many times, it will saturate in 5 cycles

• A. 5
• B. zero
• C. 10✓
• D. 6

Explanation: Explanation will be added soon

Q9. The principle of metal detector:

• A. Resonance
• B. Faraday’slaw
• C. Lenz’s law
• D. Beats✓

Explanation: Explanation will be added soon

Q10. Technological application of supere condtucor is

• A. Microwave oven
• B. MRI✓
• C. Logic Gates
• D. Transistors

Explanation: Explanation will be added soon

Q11. A two input NAND gate with inputs A and B has an input 0 if

• A. A is zero✓
• B. B is zero
• C. Both A and B are one
• D. Both A and B are zero

Explanation: Explanation will be added soon

Q12. The colour of Light emittted by LED depends on

• A. The reverse bais
• B. The amount of current forward bias
• C. The forward bias
• D. Type of semiconductor✓

Explanation: Explanation will be added soon

Q13. Diffraction of electrons indicates:

• A. Wave Nature✓
• B. Particle Nature
• C. Dual Nature
• D. Crystal Nature

Explanation: Explanation will be added soon

Q14. de Broglie wavelength of moving cricket ball is not noticed due to:

• A. Low mass
• B. High speed
• C. Time delay
• D. Low Speed✓

Explanation: Explanation will be added soon

Q15. Laser beam can be used in

• A. Holography✓
• B. X-ray machine
• C. Fission
• D. Solid structure study

Explanation: Explanation will be added soon

Q16. Xenon has:

• A. 30 isotopes
• B. 36 isotopes✓
• C. 10 isotopes
• D. 12 isotopes

Explanation: Explanation will be added soon

Q17. Charge on up, down and strange combination of quarks is

• A. e
• B. -e
• C. zero✓
• D. 2e

Explanation: Explanation will be added soon