UP Board 12th Physics Answer Key 2025 (Available): Detailed Question Paper Analysis

UP Board 12th Physics Answer Key 2025 is provided here for the analysis purposes. Students can also go through the detailed Class 12 Physics Question Paper Analysis.

Abhilasha Kiran

Updated on - Mar 8, 2025 | 10:03:00 AM

UP Board 12th Physics Answer Key 2025 is here (Image Credits: pexels.com).

UP Board 12th Physics Answer Key 2025: The Uttar Pradesh Madhyamik Shiksha Parishad (UPMSP) conducted the Class 12 Physics Exam today, March 6, 2025. The exam started at 2 PM and concluded at 5:15 PM. Students who appeared for the exam can evaluate their performance and calculate their overall scores with the help of the UP Board 12th Physics Answer Key 2025 provided here by the subject experts.

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UP Board 12th Physics Answer Key 2025

UP Board class 12 students can calculate their probable score using the unofficial UP Board 12th Physics Answer Key 2025 provided below.

Section A

Questions	Answers
1. (a) A charge q is placed at the centre of the open end of the cylindrical vessel. The flux of the electric field through the surface of the vessel is (A) zero (B) q/ε₀ (C) q/2ε₀ (D) 2q/ε₀	(C) q/2ε₀
1. (b) (A) (B) (C) (D)	To be updated
1. (c) A free electron is placed in the path of a electromagnetic waves. (A) (B) (C) (D)	To be updated
1. (d) A double convex lens has radius of curvature R of each surface and refractive index of its material is μ=1.5. We have (A) f=R/2 (B) f=R (C) f=-R (D) f=2R	(B) f=R
1. (e) The peak voltage in a 220 volt AC source is (A) 220 V (B) about 160 V (C) about 310 V (D) 440 V	(C) about 310 V
1. (f) When an impurity is doped with a pure semiconductor, the conductivity of the semiconductor (A) increases (B) decreases (C) remains the same (D) becomes zero	(A) increases

Section B

Questions	Answers
(a) Write the definition of specific resistance.	Specific resistance, or resistivity, is the intrinsic property of a material that determines its resistance per unit length and cross-sectional area.
(b) A current of 10 A is folowing in a long wire along the positive Z axis.Find the intensity of the magnetic field on a point (10cm, 0, 0).	B=20 µT
(c) Write Lenz's law.	Lenz's Law states that the direction of the induced current is such that it opposes the change in magnetic flux that caused it.
(d) What is total internal reflection?	Total internal reflection is the phenomenon where a light ray traveling from a denser medium to a rarer medium is completely reflected back into the denser medium when the angle of incidence exceeds the critical angle.
(e) Define work function.	The work function is the minimum energy required to remove an electron from the surface of a material.
(f) Write equation of energy pf photon in terms of Planck's constant and wavelength.	E=λ/(hc)
To be updated	To be updated
To be updated	To be updated
To be updated	To be updated

UP Board 12th Physics Detailed Question Paper Analysis 2025

The Uttar Pradesh Class 12 Physics Exam 2025 theory paper was conducted for 70 marks. The question paper was divided into four sections of MCQs, very short answer type, short answer type, and long answer type questions. Students can check the section-wise difficulty level of the UP Board 12th Question Paper below.

Particulars	Details
Overall Difficulty Level	Easy to Moderate
Section A Difficulty Level	Easy to Moderate
Section B Difficulty Level	Easy to Moderate
Section C Difficulty Level	Moderate
Was the paper lengthy?	No

Students who took the UPMSP Class 12 Physics exam can only use the expert-provided UP Board 12th Physics Answer Key 2025 as a reference to assess their scores.

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