PYQ Bank - EduGrown

CBSE

#1 Class 12 Physics Ray Optics and Optical Instruments 2023 Mcq 1M

A thin plano-convex lens and a thin equi-concave lens are kept coaxially in contact. Both lenses are made of glass of refractive index $\mu$, and $R$ is the radius of curvature of each curved surface. The focal length...

A. $\dfrac{R}{\mu-1}$

B. $-\dfrac{R}{\mu-1}$

C. $\dfrac{2R}{\mu-1}$

D. $-\dfrac{2R}{\mu-1}$

👁 View Answer

👍 2 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#2 Class 12 Physics Electromagnetic Waves 2023 Mcq 1M

A plane electromagnetic wave travels through a medium and the magnetic field associated with it is given by $B = 5\times10^{-8}\sin(3\times10^{10}t - 150x)$ T, where $x$ is in metres and $t$ is in seconds. The velocit...

A. $2.0\times10^{8}$ ms$^{-1}$

B. $4.5\times10^{7}$ ms$^{-1}$

C. $3.5\times10^{7}$ ms$^{-1}$

D. $2.5\times10^{8}$ ms$^{-1}$

👁 View Answer

👍 2 👎 3

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#3 Class 12 Physics Electromagnetic Induction 2023 Mcq 1M

A square loop of side 50 cm is placed in a uniform magnetic field of 3.0 T acting perpendicular to the plane of the loop. If the loop is rotated through an angle of $90^\circ$ in 0.3 s, the value of emf induced in the...

A. 0.25 V

B. 0.50 V

C. 0.75 V

D. 1.0 V

👁 View Answer

👍 1 👎 1

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#4 Class 12 Physics Electric Charges and Fields 2026 Mcq 1M

A particle of mass $m$ and charge $q$ starts from rest and moves in an electric field $\vec{E} = E_0\hat{i}$. After travelling a distance $x$ in the field along the x-axis, the kinetic energy of the particle will be:

A. $qE_0x^2$

B. $qE_0x$

C. $q^2E_0x$

D. $q^2E_0^2x$

👁 View Answer

👍 4 👎 4

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#5 Class 12 Physics Wave Optics 2022 Mcq 1M

[Case Study — Young's Double Slit Experiment] The principle of superposition is used to understand the phenomenon of interference of light waves. It states that at a particular point, the resultant displacement produc...

A. It remains constant in both cases.

B. It decreases in both cases.

C. It remains constant in (i) but decreases in (ii).

D. It decreases in (i) but remains constant in (ii).

👁 View Answer

👍 2 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#6 Class 12 Physics Wave Optics 2022 Mcq 1M

[Case Study — Young's Double Slit Experiment] The principle of superposition is used to understand the phenomenon of interference of light waves. It states that at a particular point, the resultant displacement produc...

A. 480 nm

B. 560 nm

C. 640 nm

D. 680 nm

👁 View Answer

👍 2 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#7 Class 12 Physics Wave Optics 2022 Mcq 1M

[Case Study — Young's Double Slit Experiment] The principle of superposition is used to understand the phenomenon of interference of light waves. It states that at a particular point, the resultant displacement produc...

A. $\omega_2>\omega_1>\omega_3$

B. $\omega_1>\omega_2>\omega_3$

C. $\omega_2>\omega_3>\omega_1$

D. $\omega_3>\omega_1>\omega_2$

👁 View Answer

👍 2 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#8 Class 12 Physics Wave Optics 2022 Mcq 1M

[Case Study — Young's Double Slit Experiment] The principle of superposition is used to understand the phenomenon of interference of light waves. It states that at a particular point, the resultant displacement produc...

A. Zero

B. $I_0$

C. $2I_0$

D. $4I_0$

👁 View Answer

👍 2 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#9 Class 12 Physics Wave Optics 2022 Mcq 1M

[Case Study — Young's Double Slit Experiment] The principle of superposition is used to understand the phenomenon of interference of light waves. It states that at a particular point, the resultant displacement produc...

A. (i) and (ii)

B. (ii) and (iii)

C. (iii) and (iv)

D. (iv) and (i)

👁 View Answer

👍 1 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#10 Class 12 Physics Wave Optics 2022 Short 3M

(i) Monochromatic light is incident on a surface separating two media. The frequency of the light after refraction remains unaffected but its wavelength changes. Why? (ii) The frequency of an electromagnetic radiation...

👁 View Answer

👍 2 👎 1

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#11 Class 12 Physics Dual Nature of Radiation and Matter 2022 Short 3M

Photoelectrons are emitted from a metal surface when illuminated with UV light of wavelength 330 nm. The minimum amount of energy required to emit the electrons from the surface is $3.5 \times 10^{-19}$ J. Calculate: ...

👁 View Answer

👍 2 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#12 Class 12 Physics Ray Optics and Optical Instruments 2022 Short 3M

For a glass prism of refractive index $\sqrt{3}$, the value of angle of minimum deviation $\delta$ is equal to the angle of prism A. Find the angle of prism A. How will the angle $\delta$ be affected if the prism were...

👁 View Answer

👍 2 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#13 Class 12 Physics Dual Nature of Radiation and Matter 2022 Short 3M

The de-Broglie wavelength associated with an electron is 0.30 nm. Calculate: (a) the speed, and (b) the kinetic energy (in eV), of the electron.

👁 View Answer

👍 1 👎 1

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#14 Class 12 Physics Wave Optics 2022 Short 3M

Using Huygens' principle, for a plane wavefront incident on a plane reflecting surface, draw the reflected wavefront. Hence prove laws of reflection.

👁 View Answer

👍 1 👎 1

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#15 Class 12 Physics Semiconductor 2022 Short 2M

Distinguish between intrinsic and extrinsic semiconductors. Although in an extrinsic semiconductor $n_e \neq n_h$, yet it is electrically neutral. Why?

👁 View Answer

👍 4 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#16 Class 12 Physics Ray Optics and Optical Instruments 2022 Short 3M

Find the two possible positions of an object kept in front of a lens of $+5.0\,\text{D}$, so that the image formed in both cases is four times magnified.

👁 View Answer

👍 1 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#17 Class 12 Physics Atoms 2022 Short 3M

(a) Sketch the energy level diagram for hydrogen atom. (b) Find the ratio of the longest and the shortest wavelength in Lyman series in hydrogen atom.

👁 View Answer

👍 1 👎 1

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#18 Class 12 Physics Dual Nature of Radiation and Matter 2022 Short 3M

Ultra-violet light of wavelength 200 nm from a source is incident on a metal surface. If the stopping potential is $-2.5\,\text{V}$, (a) calculate the work function of the metal, and (b) How would the surface respond ...

👁 View Answer

👍 1 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#19 Class 12 Physics Semiconductor 2022 Short 2M

Explain the formation of depletion layer and barrier potential in a p-n junction diode.

👁 View Answer

👍 1 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#20 Class 12 Physics Wave Optics 2022 Mcq 1M

CASE STUDY PASSAGE — Young's Double Slit Experiment: The principle of superposition is used to understand the phenomenon of interference of light waves. The principle states that at a particular point, the resultant d...

A. It remains constant in both cases.

B. It decreases in both cases.

C. It remains constant in (i) but decreases in (ii).

D. It decreases in (i) but remains constant in (ii).

👁 View Answer

👍 1 👎 1

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

PYQ Bank & Paper Generator

🔔 Email Updates Lein