1
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

A direct current of $$10 \mathrm{~A}$$ is superimposed on an alternating current $$i=10 \sin \omega t$$ flowing through the wire. The effective value of the resulting current will be.

A
$$(15 / 2) \mathrm{A}$$
B
$$5 \sqrt{6} \mathrm{~A}$$
C
$$5 \sqrt{5} \mathrm{~A}$$
D
$$15 \mathrm{~A}$$
2
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

The $$x$$-$$t$$ graph of a particle performing simple harmonic motion is shown in the figure. The acceleration of the particle at $$t=2. \mathrm{~s}$$ is

BITSAT 2023 Physics - Simple Harmonic Motion Question 2 English

A
$$-\frac{\pi^2}{8} \mathrm{~ms}^{-2}$$
B
$$\frac{\pi^2}{16} \mathrm{~ms}^{-2}$$
C
$$-\frac{\pi^2}{16} \mathrm{~ms}^{-2}$$
D
$$\frac{\pi^2}{8} \mathrm{~ms}^{-2}$$
3
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

A vessel is half filled with a liquid of refractive index $$\mu$$. The other half of the vessel is filled with an immiscible liquid of refractive index $$2 \mu$$. The apparent depth of the vessel is $$50 \%$$ of the actual depth. Then $$\mu$$ is

A
1.4
B
1.5
C
1.6
D
1.25
4
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

Water is flowing on a horizontal fixed surface such that its flow velocity varies with $$y$$ (vertical direction) as $$v=k\left(\frac{2 y^2}{a^2}-\frac{y^3}{a^3}\right)$$. If coefficient of viscosity for water is $$2 \eta$$. What will the shear stress between layers of water at $$y=a$$ ?

A
$$\frac{2 \eta k}{a}$$
B
$$\frac{\eta}{k a}$$
C
$$\frac{\eta a}{2 k}$$
D
None of these
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