PYQ Bank - EduGrown

CBSE

#1 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. 480 nm

B. 560 nm

C. 640 nm

D. 680 nm

👁 View Answer

👍 2 👎 3

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#2 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. $$\omega_2 > \omega_1 > \omega_3$$

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

#3 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. Zero

B. $$I_0$$

C. $$2I_0$$

D. $$4I_0$$

👁 View Answer

👍 2 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#4 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. (i) and (ii)

B. (ii) and (iii)

C. (iii) and (iv)

D. (iv) and (i)

👁 View Answer

👍 2 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

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

(i) Trace the path of a ray of light PQ which is incident at an angle $i$ on one face of a glass prism of angle A. It then emerges out from the other face at an angle $e$. Use the ray diagram to prove that the angle t...

👁 View Answer

👍 2 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#6 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

👍 1 👎 3

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#7 Class 12 Physics Semiconductor 2022 Short 3M

State the working principle of an LED. Write any two important advantages and two disadvantages of LED.

👁 View Answer

👍 3 👎 3

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#8 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 $3.5 \times 10^{-19}\,\text{J}$. Cal...

👁 View Answer

👍 2 👎 3

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

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

A thin equiconvex lens with a radius of curvature $R$ and refractive index $\mu_1$ is placed coaxially and in contact with a thin equiconcave lens of the same radius of curvature $R$ and refractive index $\mu_2$ (wher...

👁 View Answer

👍 1 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#10 Class 12 Physics Wave Optics 2022 Short 3M

A parallel beam of light of wavelength 600 nm is incident normally on a slit of width 0.2 mm. If the resulting diffraction pattern is observed on a screen 1 m away, find the distance of (i) first minimum, and (ii) sec...

👁 View Answer

👍 1 👎 1

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

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

Explain with the help of a suitable diagram, the phenomenon on which an optical fibre works. Mention any two uses of optical fibres.

👁 View Answer

👍 2 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#12 Class 12 Physics Nuclei 2022 Short 3M

Calculate the energy released in MeV in the following reaction: $^2_1H + ^3_1H \longrightarrow ^4_2He + n$ Given: $m\left(^2_1H\right) = 2.014102\,\text{u}$, $m\left(^3_1H\right) = 3.016049\,\text{u}$, $m\left(^4_2He\...

👁 View Answer

👍 2 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

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

A point source in air is kept 24 cm in front of a concave spherical glass surface ($_a\mu_g = 1.5$) and radius of curvature 60 cm. Find the nature of the image formed and its distance from the point source.

👁 View Answer

👍 1 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#14 Class 12 Physics Atoms 2022 Short 3M

Define the term – Distance of closest approach. How will it be affected, for an $\alpha$-particle, if kinetic energy of the particle is doubled?

👁 View Answer

👍 3 👎 3

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#15 Class 12 Physics Semiconductor 2022 Short 2M

Write the characteristics of a p-n junction which make it suitable for rectification.

👁 View Answer

👍 2 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#16 Class 12 Physics Dual Nature of Radiation and Matter 2022 Short 2M

Plot suitable graphs to show the variation of photoelectric current with collector plate potential for incident radiation of:The same intensity but different frequencies $f_1, f_2$, and $f_3$ ($f_1 < f_2 < f_3$)...

👁 View Answer

👍 3 👎 2

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#17 Class 12 Physics Atoms 2022 Short 2M

Draw the graph showing the variation of the number (N) of scattered alpha particles with scattering angle ($\theta$) in Geiger–Marsden experiment. Infer two conclusions from the graph.

👁 View Answer

👍 1 👎 1

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#18 Class 12 Physics Semiconductor 2022 Short 2M

Draw energy band diagrams of n-type and p-type semiconductors at temperature T > 0K, depicting the donor and acceptor energy levels. Mention the significance of these levels.

👁 View Answer

👍 1 👎 1

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#19 Class 12 Physics Semiconductor 2023 Long 4M

Case Study on semiconductor diode (forward and reverse bias): (i) For diode D with $R = 100\ \Omega$, EMF $= 3.5$ V, barrier potential $= 0.5$ V, find the current in the circuit. (ii) Identify which figure shows the p...

👁 View Answer

👍 1 👎 1

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

CBSE

#20 Class 12 Physics Semiconductor 2023 Short 3M

Explain briefly: (i) How barrier potential is formed in p-n junction diode. (ii) How the width of the depletion region is affected when it is (a) forward biased, (b) reverse biased.

👁 View Answer

👍 3 👎 3

+ Add to Paper

✅ Verified by Super Admin

Rate: ★ ★ ★ ★ ★

PYQ Bank & Paper Generator

🔔 Email Updates Lein