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

Four masses of $1 \mathrm{~kg}, 2 \mathrm{~kg}, 3 \mathrm{~kg}$ and 4 kg are kept at co-ordinates $(0,0) \mathrm{m},(0,1) \mathrm{m}$ and $(1,0) \mathrm{m}$ respectively. Using the co-ordinates of centre of mass its position vector is

A
$0.5 \hat{\mathrm{i}}+0.7 \hat{\mathrm{j}}$
B
$0.7 \hat{\mathrm{i}}+0.5 \hat{\mathrm{j}}$
C
$0.4 \hat{\mathrm{i}}+0.6 \hat{\mathrm{j}}$
D
$\hat{\mathrm{i}}+\hat{\mathrm{j}}$
2
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
$\frac{3 \mathrm{t}}{\mathrm{d}+\mathrm{t}}$
3
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
$\frac{\mathrm{mL}^2}{24}$
4
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.
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