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

The volume of a block of metal at $30^{\circ} \mathrm{C}$ changes by $0.12 \%$ when its temperature is increased to $70^{\circ} \mathrm{C}$. The coefficient of linear expansion of the metal is

A
$2 \times 10^{-5}{ }^{\circ} \mathrm{C}$
B
$3 \times 10^{-5}{ }^{\circ} \mathrm{C}$
C
$4 \times 10^{-5}{ }^{\circ} \mathrm{C}$
D
$1 \times 10^{-5}{ }^{\circ} \mathrm{C}$

2
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A galvanometer of resistance ' $G$ ' can be converted into a voltmeter of range ( $0-\mathrm{V}$ ) volt by connecting a resistance ' $R$ ' in series with it. The resistance ' $R$ required to change its range from $\left(0-\frac{\mathrm{V}}{4}\right)$ volt will be

A
$\frac{R-G}{2}$
B
$\frac{\mathrm{R}-2 \mathrm{G}}{3}$
C
$\frac{R-3 G}{4}$
D
$\frac{4 R-3 G}{5}$
3
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A light metal disc of radius ' $r$ ' floats on water surface and bends the surface downwards along the perimeter making an angle ' $\theta$ ' with the vertical edge of the disc. If the weight of water displaced by the disc is ' W ', the weight of the metal disc is [ $\mathrm{T}=$ surface tension of water]

A
$\quad \mathrm{W}-2 \pi \mathrm{r} \mathrm{T} \cos \theta$
B
$2 \pi r \mathrm{~T}+\mathrm{W}$
C
$2 \pi \mathrm{r} \mathrm{T} \cos \theta+\mathrm{W}$
D
$2 \pi \mathrm{rT} \cos \theta-\mathrm{W}$
4
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

The magnetic field at the centre of a current carrying circular coil of area ' $A$ ' is ' $B$ '. The magnetic moment of the coil is ( $\mu_0=$. permeability of free space)

A
$\frac{2 B}{\mu_0} \sqrt{\frac{A^3}{\pi}}$
B
$\frac{\mathrm{BA}^2}{4 \mu_0 \pi}$
C
$\frac{2 \pi}{\mu_0} \sqrt{A^3}$
D
$\frac{\mu_0}{2 B} \sqrt{\frac{A^3}{\pi}}$
EXAM MAP