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

In between the plates of parallel plate capacitor of plate separation 'd' a dielectric plate of thickness ' $t$ ' is inserted. The capacitance becomes one-third of the original capacity without dielectric. The dielectric constant of the plate is

A
$\frac{\mathrm{t}}{2 \mathrm{~d}-\mathrm{t}}$
B
$\frac{t}{2 d+t}$
C
$\frac{3 \mathrm{t}}{\mathrm{d}-\mathrm{t}}$
D
$\frac{3 \mathrm{t}}{\mathrm{d}+\mathrm{t}}$
2
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
$\frac{\mathrm{mL}^2}{24}$
3
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.
4
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
$\cos ^{-1}\left(\frac{2}{\sqrt{3}}\right)$
EXAM MAP