1
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

Four thin rods of same mass M and same length L form a square as shown in figure. Moment of inertia of this system about an axis passing through point O and perpendicular to its plane is

MHT CET (PCB) 2025 9th April Morning Shift Physics - Rotational Motion Question 1 English
A

$\frac{4}{3} \mathrm{ML}^2$

B

$\frac{\mathrm{ML}^2}{3}$

C

$\frac{\mathrm{ML}^2}{6}$

D

$\frac{2}{3} \mathrm{ML}^2$

2
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two spherical black bodies of radius $\mathrm{R}_1$ and $\mathrm{R}_2$ with surface temperatures $\mathrm{T}_1$ and $\mathrm{T}_2$ respectively. If $T_1=2 T_2$ and they radiate the same power then relation between $R_1$ and $R_2$ is

A

$R_2=8 R_1$

B

$\mathrm{R}_2=\mathrm{R}_1$

C

$R_2=2 R_1$

D

$R_2=4 R_1$

3
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A simple pendulum has mass 2 gram and charge $2 \mu \mathrm{C}$. In a uniform horizontal electric field of intensity $1000 \mathrm{~V} / \mathrm{m}$, pendulum is at rest. At equilibrium, the angle made by the pendulum with the vertical is ( $\mathrm{g}=$ acceleration due to gravity $=10 \mathrm{~m} / \mathrm{s}^2$ )

A

$\tan ^{-1}(0.2)$

B

$\tan ^{-1}(0.1)$

C

$\tan ^{-1}(0.4)$

D

$\tan ^{-1}(0.5)$

4
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A mass ' $M$ ' is suspended from a spring of negligible mass. The spring is pulled a little and then released so that the mass executes S.H.M. of periodic time ' $T$ '. If the mass is increased by ' $m$ ', the time period becomes $4 T / 3$, then the ratio of $\frac{\mathrm{M}}{\mathrm{m}}$ is

A

$3: 1$

B

$9: 7$

C

$7: 9$

D

$1: 3$