If you are a Bihar Board Class 12th Physics student preparing for the 2024 exam, this blog will be very useful for you. In this post, you are provided with BSEB Class 12th Physics 2024 Questions with Solutions, which will further strengthen your preparation.
BSEB Class 12th Physics 2024 Questions
1. The image formed in a compound microscope is
(A) real and erect
(B) real and inverted
(C)virtual and inverted
(D) virtual and erect
Answer: virtual and inverted
2. The image of any object formed at the retina of the human eye is
(A)real and inverted
(B) real and erect
(C) virtual and erect
(D) virtual and inverted
Answer: real and inverted
3. A convex lens is used in
(A) short-sightedness
(B) long-sightedness
(C) presbyopia
(D) astigmatism
Answer: long-sightedness
4. The colour of the sky is blue due to
(A) interference
(B) scattering
(C) diffraction
(D) polarisation
Answer: scattering
5. The fringe width in the interference of light due to two coherent sources is
(A) proportional to wavelength
(B) Inversely proportional to wavelength
(C) proportional to the square of the wavelength
(D) Inversely proportional to the square of the wavelength
Answer: inversely proportional to wavelength
6. Two sources of monochromatic light are coherent when their
(A) Intensities are equal
(B) The amplitudes are equal
(C) phases are equal
(D) None of these
Answer: Phases are equal
7. De Broglie wavelength is
(A) λ = hmv
(Β) λ = h mv
(C)mc² (C) = mc V
(D) λ = hv
Answer: λ = h mv
8. If in a logic gate output (Y) is obtained by the product of both inputs (A, B), then the gate is
(A) OR
(B) NOR
(C) NOT
(D) AND
Answer: OR
9. The width of the forbidden energy gap in the semiconductor is approximately.
(A) 1 eV
(B) 10 eV
(C) 100 eV
(D) 0.01 eV
Answer: 1 eV
10. The equivalent of decimal number 27 in the binary number system will be
(A) (10011)₂
(B) (10111)₂
(C) (11001)₂
(D) (11011)₂
Answer: (11011)₂
11. In a full-wave rectifier, if the input frequency is 50 Hz, then the output frequency will be
(A) 25 Hz
(B) 50 Hz
(C) 100 Hz
(D) 200 Hz
Answer: 50 Hz
12. The device that works off both modulation and demodulation is called
(A) laser
(B) radar
(C) modem
(D) fax
Answer: modem
13. The distance of a communication satellite from the surface of the Earth is
(A) 36000 km
(B) 36000 miles
(C) 3600 km
(D) 36000 meters
Answer: 36000 km
14. Attenuation is measured in
(A) Oham
(B) decibel
(C) mho
(D) siemen
Answer: decibel
15. Photocell is based on
(A) chemical effect of current
(B) photo-electric effect
(C) magnetic effect of current
(D) electro-magnetic induction
Answer: chemical effect of current
We have completed 15 BSEB Class 12th Physics 2024 Questions
16. Cathode rays are a group of
(A) electrons
(B) protons
(C) neutrons
(D) atoms
Answer: electrons
17. The half-life of a radioactive substance is
(Α) 0.6931 χλ
(B) log 102 λ
(C) 0.6931 λ
(D) Average age 0.6931
Answer: 0.6931 λ
18. S.I. unit of decay constant is
(A) metre
(B) hertz
(C) per metre
(D) metre²
Answer: Hertz
19. Number of neutrons in an atom of 90
The 230 is
(A) 320
(B) 230
(C) 140
(D) 90
Answer: 140
20. A p-n junction diode is used as
(B) an oscillator
(A) an amplifier
(C) a modulator
(D) A rectifier
Answer: A rectifier
21. The instrument used to increase the input voltage/current is called
(A) oscillator
(B) amplifier
(C) diode
(D) rectifier
Answer: amplifier
22. In an AC circuit, power is lost in only
(A) resistance
(B) inductance
(C) capacitance
(D) all of these
Answer: all of these
23. An alternating electric current is represented by equation 1 = 0.6 sin t. The frequency of alternating current is
(Α) 50 π
(B) 50
(C) 100 π
(D) 100
Answer: 50
24. Current used in electroplating is
(A) DC
(B) AC
(C) Both DC and AC
(D) None of these
Answer: DC
25. A large virtual image of an object is formed by
(A) concave mirror
(B) convex mirror
(C) plane mirror
(D) concave lens
Answer: concave mirror
26. The powers of the two lenses kept in contact are P₁ and P₂. The power of the equivalent lens will be F
(A) P2
(B) 2 R
(G) P₁ x P₂
(D) P + P2
Answer: P+P2
27. The wavelength of which color is minimum?
(A) Violet
(B) Yellow
(C) Blue
(D) Red
Answer: violet
28. What causes the formation of a rainbow?
(A) Diffraction
(B) Scattering is
(C) Refraction
(D) Dispersion
Answer: Refraction
29. The value of (μοερ)
(A) 3×10 cm/second
(B) 3×109 cm/second
(C) 3×1010 cm/second
(D) 3×10 km/second
Answer: 3×1010 cm/second
30. An electron of charge e moves parallel to uniform lines of force in magnetic field B with velocity v. The force acting on the electron is
(A) evB
(B) ev/B
(C) zero
(D) Bvle
Answer: Zero
We have completed BSEB Class 12th Physics 2024 Questions
Disclaimer: The questions and answers used in this post are taken from the book “Golden Publication”. We give credit to Golden Publication for this, and this blog has been created for educational purposes only.