1
MHT CET 2025 26th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

In case of free expansion, which one of the following statements is WRONG?

A
It is an instantaneous change.
B
The system is not in thermodynamic equilibrium.
C
Free expansion can be plotted on a P-V diagram.
D
It is an uncontrolled change.
2
MHT CET 2025 26th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

Applying forward bias to p-n junction, the potential barrier

A
increases.
B
decreases.
C
remains unchanged.
D
becomes zero.
3
MHT CET 2025 26th April Morning Shift
MCQ (Single Correct Answer)
+1
-0
Light of incident frequency 3 times the threshold frequency is incident on a photosensitive material. If the incident frequency is made $\left(\frac{1}{4}\right)^{\text {th }}$ and intensity is tripled then the photoelectric current will
A
increase.
B
decrease.
C
be $\left(\frac{1}{3}\right)^{\text {rd }}$
D
be zero.
4
MHT CET 2025 26th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

A capillary tube when immersed vertically in water, the rise of water column is upto height $h_1$ on earth's surface. When this arrangement is taken into a mine of depth 'd', below earth's surface, the height of the water column is $\mathrm{h}_2$. If R is the radius of the earth, the ratio $\frac{\mathrm{h}_2}{\mathrm{~h}_1}$ is

A
$\frac{R+d}{R}$
B
$\frac{\mathrm{R}-\mathrm{d}}{\mathrm{R}}$
C
$\frac{R}{R+d}$
D
$\frac{R}{R-d}$
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