CBSE 12th Physics Delhi Set 1 - 2023 | Class 12 Year Wise Previous Years Questions

CBSE 12th Physics Delhi Set 1 - 2023

MCQ (Single Correct Answer)

-0

In a Young's double-slit experiment, the screen is moved away from the plane of the slits. What will be its effect on the following?

(i) Angular separation of the fringes.

(ii) Fringe-width.

Both (i) and (ii) remain constant.

(i) remains constant, but (ii) decreases.

(i) remains constant, but (ii) increases.

Both (i) and (ii) increase.

CBSE 12th Physics Delhi Set 1 - 2023

MCQ (Single Correct Answer)

-0

The energy of a photon of wavelength $$\lambda%$ is

$$h c \lambda$$

$$h c / \lambda$$

$$\lambda / h c$$

$$\lambda h / c$$

CBSE 12th Physics Delhi Set 1 - 2023

MCQ (Single Correct Answer)

-0

The ratio of the nuclear densities of two nuclei having mass numbers 64 and 125 is

$$\frac{64}{125}$$

$$\frac{4}{5}$$

$$\frac{5}{4}$$

CBSE 12th Physics Delhi Set 1 - 2023

MCQ (Single Correct Answer)

-0

During the formation of a $$p$$-$$n$$ junction:

diffusion current keeps increasing.

drift current remains constant.

both the diffusion current and drift current remain constant.

diffusion current remains almost constant but drift current increases till both currents become equal.

Class 12 Papers

2023

2021