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

An unknown nucleus has a nuclear density of $2.29 \times 10^{17} \mathrm{~kg} / \mathrm{m}^3$ and mass of $19.926 \times 10^{-27} \mathrm{~kg}$. Its mass number $A$ is approximately:

(Take $R_0=1.2 \times 10^{-15} \mathrm{~m}, 4 \pi=12.56$ )

A

12

B

20

C

16

D

19

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

Savitha, a XI standard student, while conducting an experiment to determine the effective length of a simple pendulum $L$, notes down the data of time taken to complete 30 oscillations as 60 s and hence calculates the length of the simple pendulum as: (Take $\pi^2=9.8$, and $g=9.8 \mathrm{~m} / \mathrm{s}^2$ )

A

0.75 m

B

1.5 m

C

2 m

D

1 m

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

An electric heater supplies heat to a system at a rate of 100 W . If the system performs work at a rate of $75 \mathrm{~J} / \mathrm{s}$, then the rate at which internal energy increases will be:

A

75 W

B

100 W

C

125 W

D

25 W

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

A thin wire of length ' $L$ ' and linear mass density ' $m$ ' is bent into a circular ring (in $x-y$ plane) with centre ' $C$ ' as shown in figure. The moment of inertia of the ring about an axis $y y^{\prime}$ will be:

NEET 2026 Physics - Rotational Motion Question 1 English

A

$\frac{3 m L^3}{8 \pi}$

B

$\frac{3 m L^3}{8 \pi^2}$

C

$\frac{3 m L^2}{8 \pi}$

D

$\frac{3 m L^2}{8 \pi^2}$