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

If the electric flux entering and leaving an enclosed surface area are ' $\phi_1$ ' and ' $\phi_2$ ' respectively, the electric charge inside the surface will be ( $\varepsilon_0=$ permittivity of free space)

A

$\quad \varepsilon_0\left(\phi_1-\phi_2\right)$

B

$\quad \varepsilon_0\left(\phi_2-\phi_1\right)$

C

$\frac{\left(\phi_1+\phi_2\right)}{2}$

D

$\frac{\left(\phi_1-\phi_2\right)}{2}$

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

In thermodynamic process, for free expansion, out of the following select the 'WRONG' statement.

A

Free expansion are adiabatic expansions and there is no exchange of heat between a system and its environment.

B

There is no work done on the system or by the system.

C

It is an instantaneous change, and the system is not in thermodynamic equilibrium

D

A free expansion can be plotted on a p-v diagram.

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

The frequency of oscillation of LCR series circuit is ' $F$ '. The value of capacitance is tripled, then new frequency becomes ' xF '. The value of ' $x$ ' is

A

$\sqrt{3}$

B

$\frac{1}{\sqrt{3}}$

C

$\frac{1}{6}$

D

$\frac{1}{\sqrt{6}}$

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

The heat required to increase the temperature from 373 K to 573 K at constant volume for ideal monoatomic gas of 2 moles is ( $R=$ universal gas constant)

A

900 R

B

$\quad 300 \mathrm{R}$

C

1200 R

D

600 R