HSC 2026 Physics 2nd Paper MCQ Solution (English Version)
1. The half-life of a radioactive element is 10 days. How long will it take for 75% of the element to decay?
✓ Answer: (c) 20 d
2. 2713Al + 42He → 3014Si + ( ), the missing element in the nuclear reaction is :
✓ Answer: (c) Proton
3. The mass of the sun is 1.99 × 1030 kg. The mass of a star is 1.6 times the mass of the sun. If it becomes a black-hole, the radius of its event horizon is—
✓ Answer: (c) 4.71939 Km
4. The ultimate fate of the universe depends mainly on—
i. the geometric shape of the universe
ii. invisible forces
iii. invisible matter
Which one of the following is correct?
i. the geometric shape of the universe
ii. invisible forces
iii. invisible matter
Which one of the following is correct?
✓ Answer: (d) i, ii and iii
5. If np and ne are the number of holes and the number of conduction electrons in an intrinsic semiconductor, which of the following is true?
✓ Answer: (a) np = ne
6. In the case of transistors, the relationship between α and β is as follows :
✓ Answer: (b) α = β / (1 + β)
7. For CO2 gas, what is the SI value of Cp?
✓ Answer: (d) 33.49
8. What is the amount of work done in the isothermal process of the gas shown in the figure for one mole of gas?
✓ Answer: (a) 0.14 J
9. Which is the graph of electric field strength versus distance near a charged plane conductor?
✓ Answer: (a) [Horizontal straight line]
10. If the dielectric strength of the four-sided medium is ε0, the number of lines of force emitted by a charge q will be—
✓ Answer: (b) q / ε0
11. What is the net electric field intensity at any point outside a parallel plate conductor?
✓ Answer: (c) 0
12. Which of the following is correct regarding the use of shunt in the galvanometer circuit?
✓ Answer: (b) To decrease the current flow in the galvanometer
Answer questions 13 and 14 according to the stem:
(A circuit diagram is given with a 9V battery and resistors of 10Ω, 12Ω, 10Ω and 10Ω)
(A circuit diagram is given with a 9V battery and resistors of 10Ω, 12Ω, 10Ω and 10Ω)
13. What will be the equivalent resistance of the circuit?
✓ Answer: (c) 15.45 Ω
14. What will be the current I1 in the circuit shown in the figure?
✓ Answer: (a) 0.16 A
15. A bar magnet hanging horizontally wants to stay in the north-south direction. Because it is always—
i. the net force is zero
ii. the net torque is zero
iii. the lines of force are parallel
Which of the following is correct?
i. the net force is zero
ii. the net torque is zero
iii. the lines of force are parallel
Which of the following is correct?
✓ Answer: (a) i and ii
16. A current of 5A is flowing through a straight wire placed perpendicular to the magnetic field 10-3 Tesla. What is the force experienced by the wire per unit length?
✓ Answer: (c) 5 × 10-3 N
17. When a current of 4A is passed through a coil of 100 turns, a magnetic flux of 0.02 wb is produced. What is the self-inductance of the coil?
✓ Answer: (a) 0.5 Henry
18. In the figure, the direction of current flow in the two loops is—
✓ Answer: (a) clockwise in both
19. In the case of a convex lens, when 2f < u < ∞, which one of the following is correct?
✓ Answer: (d) f < V < 2f
Read the following stimulus and answer questions 20 and 21 :
The focal length of the objective of an astronomical telescope is 4m and the magnification is 50.
The focal length of the objective of an astronomical telescope is 4m and the magnification is 50.
20. What is the focal length of the eyepiece?
✓ Answer: (a) 0.08 m
21. The magnification of a telescope can be increased by :
✓ Answer: (c) Increases the power of the eyepiece
Answer questions 22 and 23 according to the following stimuli :
In Young's double-slit experiment, the distance between the two slits is 4 mm. A fringe of diffraction is created on a screen 2m away. The wavelength of light is 5800 Å.
In Young's double-slit experiment, the distance between the two slits is 4 mm. A fringe of diffraction is created on a screen 2m away. The wavelength of light is 5800 Å.
22. What is the width of the fringe?
✓ Answer: (c) 1.45 × 10-4 m
23. If the stimulus system is moved to a medium with a refractive index of 1.33, then :
i. The wavelength will decrease
ii. The fringe width will decrease
iii. Angular distance will decrease
Which one of the following is correct?
i. The wavelength will decrease
ii. The fringe width will decrease
iii. Angular distance will decrease
Which one of the following is correct?
✓ Answer: (d) i, ii and iii
24. In the case of photoelectric effect—
i. photocurrent depends on the intensity of light
ii. photocurrent depends on the frequency of light
iii. the stopping potential and frequency are proportional to each other
Which is correct?
i. photocurrent depends on the intensity of light
ii. photocurrent depends on the frequency of light
iii. the stopping potential and frequency are proportional to each other
Which is correct?
✓ Answer: (b) i and iii
25. What is the momentum of a particle with zero mass and energy E?
✓ Answer: (b) E / C
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