1
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

When the number of turns in a coil are made 3 times without any change in the length of the coil, its self inductance becomes

A
(9) times
B
two times
C
three times
D
four times
2
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

When a system is taken from state ' $a$ ' to state ' $c$ ' along a path abc, it is found that $\mathrm{Q}=80 \mathrm{cal}$ and $\mathrm{W}=35 \mathrm{cal}$. Along path adc $\mathrm{Q}=65 \mathrm{cal}$ the work done W along path adc is

MHT CET 2024 15th May Morning Shift Physics - Heat and Thermodynamics Question 101 English

A
20 cal.
B
35 cal.
C
45 cal.
D
65 cal.
3
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The driver of a car travelling with a speed ' $V_1$ ' $\mathrm{m} / \mathrm{s}$ towards a wall sounds a siren of frequency ' $n$ ' Hz. If the velocity of sound in air is $\mathrm{V} \mathrm{m} / \mathrm{s}$, then the frequency of sound reflected from the wall and as heard by the driver, in Hz , is

A
$\left(\frac{\mathrm{V}+\mathrm{V}_1}{\mathrm{~V}-\mathrm{V}_1}\right) \mathrm{n}$
B
$\left(\frac{V-V_1}{V+V_1}\right) n$
C
$\left(\frac{V_1-V}{V_1+V}\right) n$
D
$\left(\frac{V_1}{V_1-V}\right) n$
4
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

When a mercury drop of radius ' $R$ ' splits up into 1000 droplets of radius ' $r$ ', the change in surface energy is ( $T=$ surface tension of mercury)

A
$8 \pi R^2 T$
B
$16 \pi R^2 T$
C
$34 \pi \mathrm{R}^2 \mathrm{~T}$
D
$36 \pi R^2 T$
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