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

A particle performs S.H.M. with amplitude 'A'. The speed of the particle is $\left(\frac{1}{3}\right)^{\text {rd }}$ of the maximum speed when its displacement from the mean position is

A

$\frac{\mathrm{A}}{3}$

B

$\frac{\sqrt{2} \mathrm{~A}}{3}$

C

$\frac{2 \sqrt{2} \mathrm{~A}}{3}$

D

$\frac{2 \mathrm{~A}}{3}$

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

In the Bohr model of hydrogen atom, out of the following quantities, the principal quantum number is proportional to ( $\mathrm{R}, \mathrm{V}$ and E represent radius of the orbit, speed of electron and total energy of the electron respectively)

A

$\frac{\mathrm{V}}{\mathrm{R}}$

B

VR

C

$\frac{E}{V}$

D

$\frac{E}{R}$

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

An open organ pipe and a closed organ pipe have the frequency of their second overtone identical. The ratio of length of closed pipe to that of open pipe is (Neglect end correction)

A

$2: 3$

B

$5: 6$

C

$3: 4$

D

$6: 7$

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

An object is released from a distance ' $r$ ' from the centre of the earth. The velocity of the object at the time of striking the earth will be ( $R=$ radius of earth, $r>R, g=$ acceleration due to gravity)

A

$[2 \mathrm{gR}(\mathrm{r}-\mathrm{R}) / \mathrm{r}]^{\frac{1}{2}}$

B

$\left[g R(r-R) / r^2\right]^{\frac{1}{2}}$

C

$\quad\left[2 \mathrm{gR}(\mathrm{r}-\mathrm{R}) / \mathrm{r}^2\right]^{\frac{1}{2}}$

D

$\left[g R^2(r-R) / r^2\right]^{\frac{1}{2}}$