Punjab Physics 2018 Paper 2 — Solved Past Paper with Answers

Q1. The factor h ╱mnc2 in compton equation has the dimension of:

• A. Pressure
• B. Mass
• C. Momentum
• D. Length✓

Explanation: Explanation will be added soon!

Q2. Number of series lies in infrared region is:

• A. one
• B. two
• C. three
• D. four✓

Explanation: Explanation will be added soon!

Q3. Half life of radon gas is:

• A. 3.8 minutes
• B. 3.8 days
• C. 3.8 seconds
• D. 3.8 months✓

Explanation: Explanation will be added soon!

Q4. Neutron was discovered by:

• A. Rutherford
• B. Becqueral
• C. Curie
• D. Chadwick✓

Explanation: Explanation will be added soon!

Q5. The potential difference across the two plates of a parallel plates capacitor is doubled, then energy stored in it will be:

• A. two times
• B. four times
• C. eight times
• D. remains constant✓

Explanation: Explanation will be added soon!

Q6. Electron volt is a unit of:

• A. Charge
• B. Potential
• C. Resistance
• D. Energy✓

Explanation: Explanation will be added soon!

Q7. mho m’ is the SI unit of:

• A. conductivity
• B. conductance
• C. resistance
• D. capacitance✓

Explanation: Explanation will be added soon!

Q8. The magnetic force is simply a:

• A. reflecting force
• B. deflecting force
• C. restoring force
• D. gravitational force✓

Explanation: Explanation will be added soon!

Q9. Tesla can be written as:

• A. NAm-1
• B. NA-1m-1
• C. N-1Am-1
• D. NA-1m✓

Explanation: Explanation will be added soon!

Q10. Henry is SI unit of:

• A. current
• B. resistance
• C. magnetic flux
• D. self induction✓

Explanation: Explanation will be added soon!

Q11. A step-down transformer:

• A. increases current
• B. decreases current
• C. current remains constant
• D. current becomes infinite✓

Explanation: Explanation will be added soon!

Q12. Alternating voltage source changes its polarity_ in one cycle.

• A. once
• B. twice
• C. thrice
• D. four time✓

Explanation: Explanation will be added soon!

Q13. At resonance the impedance of RLC series circuit is:

• A. maximum
• B. zero
• C. minimum
• D. intermediate✓

Explanation: Explanation will be added soon!

Q14. The SI unit of stress is same as that of:

• A. momentum
• B. pressure
• C. force
• D. length✓

Explanation: Explanation will be added soon!

Q15. A photo diode can switch its current on or off in:

• A. nano second
• B. milli second
• C. micro second
• D. centi second✓

Explanation: Explanation will be added soon!

Q16. The magnitude of open loop gain of the OP-Amp is of the order of:

• A. 107
• B. 103
• C. 105
• D. 102✓

Explanation: Explanation will be added soon!

Q17. The SI unit of planck's constant is:

• A. JS-1
• B. JS
• C. JS2
• D. JS-2✓

Explanation: Explanation will be added soon!