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

If an electron in hydrogen atom jumps from $3^{\text {rd }}$ orbit to $2^{\text {nd }}$ orbit it emits a photon of wavelength ' $\lambda$ '. When it emits a photon from $4^{\text {th }}$ orbit to $3^{\text {rd }}$ orbit then the corresponding wavelength of emitted photon will be

A
$\frac{16}{25} \lambda$
B
$\frac{9}{16} \lambda$
C
$\frac{20}{7} \lambda$
D
$\frac{20}{13} \lambda$
2
MHT CET (PCB) 2024 22th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A solenoid having 400 turns/metre has a core of a material with relative permeability 300 . If a current of 0.5 A is passed through it, then the magnetisation of the core material is nearly

A
$6 \times 10^2 \mathrm{~A} / \mathrm{m}$
B
$6 \times 10^3 \mathrm{~A} / \mathrm{m}$
C
$6 \times 10^4 \mathrm{~A} / \mathrm{m}$
D
$6 \times 10^5 \mathrm{~A} / \mathrm{m}$
3
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
$1 \times 10^{-5}{ }^{\circ} \mathrm{C}$

4
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
$\frac{4 R-3 G}{5}$
EXAM MAP