1
TS EAMCET 2022 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A cylindrical tube open at both ends has a fundamental frequency $f$ in air. The tube is dipped vertically in water, so that half of it is in water. The new fundamental frequency is

A

$f$

B

$\frac{f}{2}$

C

$2 f$

D

$4 f$

2
TS EAMCET 2022 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A convex lens of focal length 25 cm and made of glass with refractive index 1.5 is immersed in water. the absolute change in focal length of the glass is [use refractive index of water $=4 / 3$ ]

A

100 cm

B

37.5 cm

C

75 cm

D

12.5 cm

3
TS EAMCET 2022 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a Young's double slit experiment, if the distance between two slits is reduced by a factor of 2 and the wavelength of light is increased 4 times then the distance between two maxima will become $\_\_\_\_$ times the original value

A

2

B

4

C

8

D

16

4
TS EAMCET 2022 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A small block of mass 5 g and charge $5 \mu \mathrm{C}$ is placed on insulated, frictionless, inclined plane of angle $60^{\circ}$. An electric field is applied parallel to the inclined plane. If the block remains at rest, then the magnitude of electric field is (take, $g=10 \mathrm{~m} / \mathrm{s}^2$ )

A

$\frac{10^5}{\sqrt{3}} \mathrm{~N} / \mathrm{C}$

B

$\frac{5}{\sqrt{3}} \times 10^4 \mathrm{~N} / \mathrm{C}$

C

$\sqrt{3} \times 10^4 \mathrm{~N} / \mathrm{C}$

D

$2 \times 10^4 \mathrm{~N} / \mathrm{C}$

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