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

Two coils having self-inductances $\mathrm{L}_1=75 \mathrm{mH}$ and $L_2=48 \mathrm{mH}$ are coupled with each other. If the mutual inductance of the coils is 37.2 mH , then coefficient of coupling will be

A

0.58

B

0.60

C

0.62

D

0.64

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

When a big drop of water is formed from n small drops of water, the energy loss is 4 E , where E is the energy of the bigger drop. If $R$ and $r$ is the radius of the bigger and the smaller drop respectively then number of smaller drops $n$ is

A

$\frac{5 R^2}{r^2}$

B

$\frac{2 R^2}{r}$

C

$\frac{5 R}{r}$

D

$\frac{5 R^2}{r}$

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

Monochromatic light of wavelength $4800 \mathop {\rm{A}}\limits^{\rm{o}}$ falls on slit of width ' $a$ '. For what value of ' $a$ ', the first maximum falls at $30^{\circ} .\left(\sin 30^{\circ}=0.5\right)$

A

$14200 \mathop {\rm{A}}\limits^{\rm{o}}$

B

$14400 \mathop {\rm{A}}\limits^{\rm{o}}$

C

$14600 \mathop {\rm{A}}\limits^{\rm{o}}$

D

$15000 \mathop {\rm{A}}\limits^{\rm{o}}$

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

A bucket filled with water is revolved in a vertical circle of radius 10 m and water just not fall down. The time period of revolution will be (acceleration due to gravity $=10 \mathrm{~m} / \mathrm{s}^2$ )

A

$\pi \mathrm{s}$

B

$2 \pi \mathrm{~s}$

C

$10 \pi \mathrm{~s}$

D

$20 \pi \mathrm{~s}$