1
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

For a metal of work function 6.6 eV , which of the following wavelengths of incident radiation does not give rise to the photoelectric effect?

(Take Planck's constant as $6.6 \times 10^{-34} \mathrm{~J} \mathrm{~s}$ )

A

100 nm

B

150 nm

C

200 nm

D

50 nm

2
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

In a concave lens, a ray of light emanating from the object parallel to the principal axis of the lens after refraction:

A

passes through $2 F$, which is the radius of curvature of the lens.

B

appears to diverge from the first principal focus.

C

emerges parallel to the principal axis.

D

passes through the second principal focus.

3
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

A submarine is designed to withstand an absolute pressure of 100 atm . How deep can it go below the water surface?

(Consider the density of water $=1000 \mathrm{~kg} \mathrm{~m}^{-3}$, $1 \mathrm{~atm}=1 \times 10^5 \mathrm{~Pa}$ and gravitational acceleration $g=10 \mathrm{~m} / \mathrm{s}^2$ )

A

990 m

B

9900 m

C

99 m

D

9000 m

4
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

$$ \text { Match List I with List II: } $$

List-I
(Electromagnetic wave)
List-II
(Production)
A. Microwave I. Electrons in atoms emit light when they move from a higher energy level to a lower energy level
B. Visible light II. Radioactive decay of nucleus
C. Gamma rays III. Vibration of atoms and molecules
D. Infra-red rays IV. Klystron valve or magnetron valve
Choose the correct answer from the options given below:
A

A-III, B-I, C-II, D-IV

B

A-III, B-IV, C-I, D-II

C

A-IV, B-I, C-II, D-III

D

A-IV, B-III, C-II, D-I