1
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

A large open tank containing water has two holes to its wall. A square hole of side $a$ is made at a depth $$y$$ and a circular hole of radius $$r$$ is made at a depth $$16 y$$ from the surface of water. If equal amount of water comes out through both the holes per second, then the relation between $$r$$ and $$a$$ will be

A
$$r=\frac{a}{2 \sqrt{\pi}}$$
B
$$r=\frac{a}{2 \pi}$$
C
$$r=\frac{2 a}{\pi}$$
D
$$r=\frac{2 \mathrm{a}}{\sqrt{\pi}}$$
2
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

Refractive index of the medium is $$\mu$$ and wavelength is $$\lambda$$, then which of the following proportionality relation is correct?

A
$$\mu \propto \lambda^2$$
B
$$\mu \propto \frac{1}{\lambda}$$
C
$$\mu \propto \lambda$$
D
$$\mu \propto \frac{1}{\lambda^2}$$
3
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

$$A$$ transistor has a voltage gain $$A$$. If the amount $$\beta A$$ of its output is applied to the input of the transistor, then the transistor becomes oscillator, when

A
$$\beta A=0$$
B
$$\beta A=1$$
C
$$\beta A=\infty$$
D
$$\beta=0$$
4
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

A spherical rubber balloon carries a charge, uniformly distributed over the surface. As the balloon is blown up and increases in size, the total electric flux coming out of the surface

A
increases
B
remains unchanged
C
becomes zero
D
decreases
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