PhysicsClass 12English

CBSE Class 12 Physics Sample Paper 2023

This sample paper mirrors the MCQ and short-answer format of CBSE Class 12 board exams, testing your ability to solve problems in real time under pressure. You'll encounter questions spanning electrostatics and current electricity, magnetic effects and electromagnetic induction, and modern physics — exactly the mix that appear in the actual exam. Designed for Class 12 students in their final revision stretch, this paper lets you practise marking your strongest and weakest topics before exam day. By the end, you'll spot which concepts still need drilling and exactly how many minutes you can afford per question type.

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Question 1
Two point charges of $+4 \text{ μC}$ and $-4 \text{ μC}$ are placed $0.1 \text{ m}$ apart. The electric potential at the midpoint between them is:
Question 2
A capacitor of capacitance $10 \text{ μF}$ is charged to a potential of $100 \text{ V}$ . The energy stored in the capacitor is:
Question 3
In a circuit, the equivalent resistance of three resistors of $10 \text{ Ω}$ , $20 \text{ Ω}$ , and $30 \text{ Ω}$ connected in parallel is:
Question 4
A conductor carrying a current of $5 \text{ A}$ is placed in a magnetic field of $2 \text{ T}$ perpendicular to the wire. If the length of the wire is $0.5 \text{ m}$ , the force on the wire is:
Question 5
The SI unit of magnetic flux is:
Question 6
A rectangular coil of area $0.1 \text{ m}^2$ is rotated in a uniform magnetic field of $0.5 \text{ T}$ at an angular velocity of $10 \text{ rad/s}$ . The maximum EMF induced in the coil is:
Question 7
According to Lenz's law, the direction of the induced current in a closed loop opposes the change in magnetic flux through the loop.
Question 8
The work function of a metal is $3 \text{ eV}$ . The threshold frequency for the photoelectric effect is: (Use $h = 6.63 \times 10^{-34} \text{ J·s}$ and $1 \text{ eV} = 1.6 \times 10^{-19} \text{ J}$ )
Question 9
The de Broglie wavelength of a particle with momentum $p$ is given by:
Question 10
The Bohr model assumes that electrons move in circular orbits around the nucleus. Which of the following is NOT a postulate of the Bohr model?
Question 11
The half-life of a radioactive element is the time taken for half of the original sample to decay.
Question 12
In a p-n junction diode, the potential barrier at the junction is approximately:
Question 13
Two parallel plates separated by a distance of $0.01 \text{ m}$ have a potential difference of $1000 \text{ V}$ between them. The electric field between the plates is:
Question 14
A wire of length $L$ and cross-sectional area $A$ has a resistance $R$ . If the wire is stretched to twice its original length, the new resistance will be: