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

In series LCR circuit, 'R' represents resistance of electric bulb. If the frequency of a.c. supply is doubled, the value of inductance ' $L$ ' and capacitance 'C' should be

A
both doubled.
B
made four times.
C
made eight times.
D
both halved simultaneously.
2
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two point charges $\mathrm{q}_1=6 \mu \mathrm{C}$ and $\mathrm{q}_2=4 \mu \mathrm{C}$ are kept at points $A$ and $B$ in air where $A B=10 \mathrm{~cm}$. What is the increase in potential energy of the system when $\mathrm{q}_2$ is moved towards $\mathrm{q}_1$ by 2 cm ?

$$\left(\frac{1}{4 \pi \varepsilon_0}=9 \times 10^9 \text { SI units }\right)$$

A
0.27 J
B
0.54 J
C
0.81 J
D
54 J
3
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two light rays having the same wavelength ' $\lambda$ ' in vacuum are in phase initially. Then, the first ray travels a path ' $\mathrm{L}_1$ ' through a medium of refractive index ' $\mu_1$ ' while the second ray travels a path of length ' $L_2$ ' through a medium of refractive index ' $\mu_2$ '. The two waves are then combined to observe interference. The phase difference between the two waves is

A
$\frac{2 \pi}{\lambda}\left(\mu_1 L_1-\mu_2 L_2\right)$
B
$\frac{2 \pi}{\lambda}\left(L_2-L_1\right)$
C
$\frac{2 \pi}{\lambda}\left(\frac{\mathrm{~L}_1}{\mu_1}-\frac{\mathrm{L}_2}{\mu_2}\right)$
D
$\frac{2 \pi}{\lambda}\left(\mu_2 \mathrm{~L}_1-\mu_1 \mathrm{~L}_2\right)$
4
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Prong of a vibrating tuning fork is in contact with water surface. It produces concentric circular waves on the surface of water. The distance between five consecutive crests is 0.8 m and the velocity of wave on the water surface is $56 \mathrm{~m} / \mathrm{s}$. The frequency of tuning fork is

A
256 Hz
B
280 Hz
C
341 Hz
D
512 Hz
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