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

The value of acceleration due to gravity (g) becomes $\left(\frac{g}{3}\right)$ at height ' $h$ ' above the earth's surface. If ' R ' is the radius of earth, the height h will be equal to

A

$\sqrt{3} \mathrm{R}$

B

3 R

C

$(\sqrt{3}-1) \mathrm{R}$

D

$(\sqrt{3}+1) R$

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

A bicycle wheel of diameter ' $D$ ' has ' $N$ ' number of spokes. Wheel is rotating at the rate of ' $x$ ' revolutions per minute, perpendicular to the horizontal component of earth's magnetic field ' $\mathrm{B}_{\mathrm{H}}$ '. The e.m.f. induced between the rim and the centre of the wheel will be

A

$\frac{\mathrm{B}_{\mathrm{H}} \pi \mathrm{Dx}}{120}$

B

$\quad \frac{\mathrm{B}_{\mathrm{H}} \pi \mathrm{Dx}}{240}$

C

$\frac{B_H \pi D^2 x}{240}$

D

$\quad \frac{\mathrm{B}_{\mathrm{H}} \pi \mathrm{D}^2 \mathrm{x}}{120}$

3
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

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

4
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

$R_2=4 R_1$