RBSE 12th Physics Question Paper 2025 PDF (8 March)- Exam Analysis, Answer Key

RBSE 12th Physics Question Paper 2025: Highlights

Highlights of RBSE class 12th Physics paper 2025 are given table below:

RBSE 12th Physics Question Paper 2025 PDF

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RBSE 12th Physics Answer Key and Solution 2025

Students can match their answer with the correct answer of the RBSE class 12 physics paper, which is given below. Stay updated on this page for detailed solutions and answer keys.

RBSE Class 12 Physics Answer Key SS-40

Question 1 :
The question asks for the SI unit of electric flux.
Electric flux $\left(\Phi_E\right)$ is given by:

$$
\Phi_E=E \cdot A
$$

where:
- $E$ is the electric field with SI units of $N / C$ (Newton per Coulomb),
- $A$ is the area with SI units of $m^2$ (square meters).

Thus, the SI unit of electric flux is:

$$
N \cdot m^2 / C
$$

From the given options, the correct answer is:
(अ) or (A) $N \cdot C^{-1} \cdot m^2$.

Question 2 :
The question is based on Coulomb's Law, which states that the force $F$ between two point charges is given by:

$$
F=\frac{k q_1 q_2}{r^2}
$$

where:
- $k$ is Coulomb's constant,
- $q_1$ and $q_2$ are the magnitudes of the charges,
- $r$ is the distance between the charges.

Initially, the force is given as $F$ when the distance is $r$ :

$$
F=\frac{k q_1 q_2}{r^2}
$$

Now, if the distance is increased to $2 r$, the new force $F^{\prime}$ will be:

$$
\begin{aligned}
F^{\prime} & =\frac{k q_1 q_2}{(2 r)^2} \\
F^{\prime} & =\frac{k q_1 q_2}{4 r^2} \\
F^{\prime} & =\frac{F}{4}
\end{aligned}
$$

Thus, the correct answer is (स) $\frac{F}{4}$.

Question 3 :

- The $10 \Omega$ resistor is in the middle of a balanced Wheatstone bridge, so no current flows through it. We can ignore it.

- The left and right pairs of $5 \Omega$ resistors are in series:

$$
5 \Omega+5 \Omega=10 \Omega
$$

- These two $10 \Omega$ resistances are in parallel:

$$
R_{\mathrm{eq}}=\frac{10 \Omega \times 10 \Omega}{10 \Omega+10 \Omega}=5 \Omega
$$

from Ohm's Law,
- Given voltage $=\mathbf{2 V}$, total resistance $=\mathbf{5 \Omega}$.
- Current, $I=\frac{V}{R}=\frac{2}{5} A$.

The current is $\frac{2}{5} A$, so the correct choice is:
ब) $\frac{2}{5} A$.

RBSE Class 12 Physics Question Paper 2025 Exam Analysis

The question paper was very well-structured and had everything prescribed in the curriculum and the blueprint of the topic. Those students who had a clear understanding of the topics, as well as regularly practised our test paper and numerical questions, could easily handle this paper.

By reading this article, students can download the RBSE 12th physics question paper PDF 2025, which will help to understand the structure of the exam pattern of the question paper and the level. Also, students can check the RBSE class 12 physics answer key to match their answers and calculate the final score.

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