1
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A thin rod of length ' 4 L ' and mass ' 4 m ' is bent at the points as shown in the figure. The moment of inertia of the rod about an axis passing through point ' $O$ ' and perpendicular to plane of the paper is

MHT CET (PCB) 2024 22th April Morning Shift Physics - Rotational Motion Question 3 English
A
$\frac{\mathrm{mL}^2}{3}$
B
$\frac{10 \mathrm{~mL}^2}{3}$
C
$\frac{\mathrm{mL}^2}{12}$
D
$\frac{\mathrm{mL}^2}{24}$
2
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

The resistance of a coil for d.c. is $5 \Omega$. In a.c., the resistance will

A
remain same.
B
increase.
C
decrease.
D
be zero.
3
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

When a ray of light is refracted from one medium to another, then the wavelength changes from $6000 \mathop {\rm{A}}\limits^ \circ$ to $4000 \mathop {\rm{A}}\limits^ \circ$. The critical angle for the interface will be

A
$\cos ^{-1}\left(\frac{3}{2}\right)$
B
$\sin ^{-1}\left(\frac{2}{\sqrt{3}}\right)$
C
$\sin ^{-1}\left(\frac{2}{3}\right)$
D
$\cos ^{-1}\left(\frac{2}{\sqrt{3}}\right)$
4
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A pipe closed at one end vibrating in fifth overtone is in unison with open pipe vibrating in its fifth overtone. The ratio of $l_{\mathrm{c}}: l_{\mathrm{o}}$ is $\left[l_{\mathrm{c}}=\right.$ vibrating length of closed pipe, $l_0=$ vibrating length of open pipe]

A
$12: 11$
B
$1: 1$
C
$11: 12$
D
$5: 1$
EXAM MAP