2nd Year Physics Paper Annual 2023 Subjective New Course Paper 2023 Group 1st Bahawalpur Board, Past Papers Group 1st , First Annual Examination 2023 Solved Questions with Answers download Pdf Bahawalpur Board.

12th Class Physics Paper Annual 2023 (Morning)
BISE Bahawalpur Board

Physics (Subjective)
2nd Year ( Inter Part 2)
Group 1st (Morning)
First Annual 2023
Time 2H 40Minutes
Subjective Total Marks : 68

Note: It is compulsory to attempt any (8 – 8) Parts each from Q.No. 2, Q.No.3 and attempt any (6) Parts from Q.No.4. Attempt any (3) Questions from Part – 2.

Write same Question No. and its Part No. as given in the Question Paper.

Make Diagram where necessary.

SHORT Questions

Question No.2 Attempt any 8 Parts.                  (8 x 2 = 16)

1. Do Electrons tend to go to region of High Potential or of low Potential ?
2. Is Vector E necessarily Zero inside a charged rubber balloon If balloon is spherical ? Assume that charge Is distributed uniformly over the surface.
3. How charged particle work during their flight In inkjet printer?
4. What Is Potential Gradient? Give its units.
5. Why the Resistance of an Ammeter should be very low 1
6. If a charged particle moves in a straight line through some region of space, can you say magnetic field in this region is zero?
7. How you express Magnetic Flux? On what factor it depends?
8. How we can increase the range of Voltmeter?
9. What do we mean by the term Critical Mass?
10. What do you understand by “Background Radiation”? State two sources of Radiation.
11. What do you mean by Quark?
12. What is Radiography? What is its importance?

Q. No.3 Attempt any 8 Parts.           (8 x 2 = 16)

1. hy does the Resistance of a conductor rise with temperature ?
2. Do bends in a wire affect its Electric Resistance? Explain.
3. Name any four sources of Current.
4. Explain the conditions under which Electromagnetic Waves are produced from a source.
5. How many times per second will an Incandescent Lamp reach maximum brilliance when connected to a 50 Hz source?
6. What do you mean by Root Mean Square Value ( rms ) ?
7. Differentiate between Crystalline Amorphous and Polymeric Solids?
8. What is meant by Para, Dia and Ferromagnetic Substance? Give example of each.
9. Explain what is Curie Temperature ?
10. Why a Photodiode is operated in reverse biased state ?
11. What is the Net Charge on a n – type or p – type substance ?
12. The input of a gate are ‘ 1’ and ‘0’. Identify the gate if its output is
    (a) 0 (b) 1

Q.No.4 Attempt any 6 Parts.                                   (6 x 2 = 12)

1. What does Negative Sign in Equation of Faraday’s Law indicate ?
2. Define the Si Unit of Mutual Inductance Henry.
3. Can a D.C. Motor be turned into a D.C. Generator? What changes are required to be done ?
4. Which Photon red , green or blue carries the most : (a) Energy and (b) Momentum ?
5. Which has the Lower Energy Quanta Radio waves or X – rays ?
6. From theory of Relativity, derive the expression of Momentum of Photon.
7. What is Energy of a Photon in a beam of infrared Radiation of Wavelength 1240 nm ?
8. What do we mean when we say that the atom is excited ?
9. Differentiate between Spontaneous Emission and Induced or Stimulated Emission.

Part – II
(8×3 = 24)

Note: Attempt any three Question from this Part.

Q. No. 5 (a). State and Explain Coulomb’s Law.     (5)
Q. No. 5 (b). 1.0 x 107 Electrons pass through a conductor in 1.0. Find the current in Ampere flowing through the conductor. Electric Charge is 1.6 x 10 -19 C .     (3)

Q. No. 6 (a). What is Motional emf ? Derive an expression for it .     (5)
Q. No. 6 (b) What current should pass through a Solenoid that is 0.5 m long with 10,000 turns of Copper so that is will a magnetic field 0.4 T ?     (3)

Q. No. 7 (a) How Transistor can be used as Amplifier ? Explain with Circuit and derive expression for voltage gain.     (5)
Q. No. 7 (b) What is the Resonant Frequency of a circuit which includes a coil of Inductance 2.5 H and a Capacitance 40 uF ?     (3)

Q. No. 8 (a) Describe the Wave Nature of Particle. Also discuss Davisson and Germer Experiment.     (5)
Q. No. 8 (b) A 1.25 cm diameter cylinder is subjected to a load of 2500 Kg. Calculate the stress on the bar in Mega Pascals.     (3)

Q. No. 9 (a) What is Spectroscopy ? Derive the expression that in Bohr’s Atomic Model of Hydrogen Atom , Bohr’s Orbital Energies are Quantized.     (5)
Q. No. 9 (b) How much energy is absorbed by a man of mass 80 Kg who receives a lethal whole body equivalent dose of 400 rem in the form of low energy Neutrons for which RBE factor is 10 ?      (3)

12th Class Physics Group 1st New Course Paper 1st Annual Examination 2023 Group First BISE Bahawalpur

12th Class Past Papers 2023 download pdf

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