1
MHT CET 2024 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Using Bohr's model, the orbital period of electron in hydrogen atom in $\mathrm{n}^{\text {th }}$ orbit is ( $\mathrm{m}=$ mass of electron, $\mathrm{h}=$ Planck's constant, $\mathrm{e}=$ electronic charge, $\varepsilon_0=$ permittivity of free space)

A
$\frac{2 \varepsilon_0^2 n^2 h^2}{m e^4}$
B
$\frac{4 \varepsilon_0^2 \mathrm{n}^2 \mathrm{~h}^2}{\mathrm{me}^2}$
C
$\frac{4 \varepsilon_0^2 \mathrm{n}^3 \mathrm{~h}^3}{\mathrm{me}^4}$
D
$\frac{4 \varepsilon_0 \mathrm{n}^2 \mathrm{~h}^2}{\pi \mathrm{me}^2}$
2
MHT CET 2024 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Initial pressure and volume of a gas are ' P ' and ' $V$ ' respectively. First its volume is expanded to ' 4 V ' by isothermal process and then again its volume is reduced to ' V ' by adiabatic process then its final pressure if $\left(\gamma=\frac{3}{2}\right)$

A
P
B
2P
C
3P
D
4P
3
MHT CET 2024 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In the following graph of flux density versus magnetizing force, coercivity and retentivity are respectively represented by the points

MHT CET 2024 10th May Morning Shift Physics - Magnetism and Matter Question 7 English

A
c, b
B
a, o
C
d, c
D
f, e
4
MHT CET 2024 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two identical capacitors have the same capacitance ' $C$ '. One of them is charged to potential $\mathrm{V}_1$ and other to $\mathrm{V}_2$. The negative ends of capacitors are connected together. When positive ends are also connected, the decrease in energy of the combined system is

A
$\frac{1}{4} \mathrm{C}\left(\mathrm{V}_1^2+\mathrm{V}_2^2\right)$
B
$\frac{1}{4} \mathrm{C}\left(\mathrm{V}_1^2-\mathrm{V}_2^2\right)$
C
$\frac{1}{4} C\left(V_1+V_2\right)^2$
D
$\frac{1}{4} \mathrm{C}\left(\mathrm{V}_1-\mathrm{V}_2\right)^2$
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