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

In photoelectric effect experiment, the stopping potential for a given metal is $\mathrm{V}_0$ (in volt) when radiation of wavelength $\lambda_0$ is used. If radiation of wavelength $5 \lambda_0$ is used with the same metal, then the stopping potential is (in volt) ( $\mathrm{h}=$ Planck's constant, $\mathrm{c}=$ velocity of light, $\mathrm{e}=$ electronic charge)

A

$\quad \mathrm{V}_0-\frac{4 \mathrm{hc}}{5 \mathrm{e} \lambda_0}$

B

$\quad \mathrm{V}_0+\frac{4 \mathrm{hc}}{5 \mathrm{e} \lambda_0}$

C

$\mathrm{V}_0+\frac{2 \mathrm{hc}}{3 \mathrm{e} \lambda_0}$

D

$\quad \mathrm{V}_0-\frac{2 \mathrm{hc}}{3 \mathrm{e} \lambda_0}$

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

A transverse wave is moving along a string. The linear density of a vibrating string is $2 \times 10^{-3} \mathrm{~kg} / \mathrm{m}$. The wave equation is $y=0.02 \sin (2 x+10 t) m$. The tension in the string is

A

$2 \times 10^{-2} \mathrm{~N}$

B

$5 \times 10^{-2} \mathrm{~N}$

C

$2 \times 10^{-3} \mathrm{~N}$

D

$5 \times 10^{-3} \mathrm{~N}$

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

Out of the following properties describing diamagnetism, identify the property which is "WRONG"

A

Diamagnetic materials possess no net magnetic dipole moment.

B

Diamagnetic materials are repelled by a magnet.

C

When placed in external magnetic field diamagnetic materials move from stronger to weaker part of magnetic field.

D

The magnetic susceptibility of diamagnetic materials is positive.

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

In Young's double slit experiment, waves from slits ' $\mathrm{S}_1$ ' and ' $\mathrm{S}_2$ ' have a path difference of $\frac{\lambda}{4}$ and $\frac{\lambda}{6}$ respectively at points $x$ and $y$ on the screen. The ratio of intensities at points $y$ to that at $x$ is $\left(\cos 45^{\circ}=\frac{1}{\sqrt{2}}, \cos 30^{\circ}=\sqrt{3} / 2,\right)$

A

$1: 3$

B

$3: 2$

C

$3: 4$

D

$2: 3$