Properties of Solids & Liquids (KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 11 - 13 of 15

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 268 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

Question number: 11

» Properties of Solids & Liquids » Surface Energy and Surface Tension

MCQ▾

Question

A hollow sphere has a small hole in it. On lowering the sphere in a tank of water, it is observed that water enters into the hollow sphere at a depth of 60 cm below the surface. Surface tension of water is 7×102Nm1 . The diameter of the hole is,

Choices

Choice (4) Response

a.

121mm

b.

128mm

c.

114mm

d.

142mm

Question number: 12

» Properties of Solids & Liquids » Application of Surface Tension

MCQ▾

Question

Two circular glass plates each of radius R = 15 cm are pressed together with a liquid film of thickness d=2.5×106m . Assuming that the liquid completely wets the glass plates, compute the force normal to plates required to pull them apart. S. T. of liquid = 0.070 N/m.

Choices

Choice (4) Response

a.

3.95 N

b.

2.15 N

c.

4.25 N

d.

2.86 N

Question number: 13

» Properties of Solids & Liquids » Young's Modulus

Appeared in Year: 2016

MCQ▾

Question

A monochromatic light source S of wavelength 440nm is placed slightly above a plane mirror M as shown. Image of S in M can be used as a virtual source to produce interference fringes on the screen. The distance of source S from O is 20.0cm , and the distance of screen from O is 100.0cm (figure is not to scale). If the angle θ=0.50×103 radians, the width of the interference fringes observed on the screen is –

Quadrilateral poly1 Quadrilateral poly1: Polygon A, B, C, DAngle α Angle α: Angle between E, B, ASegment a Segment a: Segment [A, B] of Quadrilateral poly1Segment b Segment b: Segment [B, C] of Quadrilateral poly1Segment c Segment c: Segment [C, D] of Quadrilateral poly1Segment d Segment d: Segment [D, A] of Quadrilateral poly1Segment f Segment f: Segment [E, B] Segment g Segment g: Segment [F, G] Point E E = (-3.4, 3.74) Point E E = (-3.4, 3.74) SO = 20.0 cm text1 = “SO = 20.0 cm”SO = 20.0 cm text1 = “SO = 20.0 cm”SO = 20.0 cm text1 = “SO = 20.0 cm”SO = 20.0 cm text1 = “SO = 20.0 cm”SO = 20.0 cm text1 = “SO = 20.0 cm”SO = 20.0 cm text1 = “SO = 20.0 cm”SO = 20.0 cm text1 = “SO = 20.0 cm”SO = 20.0 cm text1 = “SO = 20.0 cm”SO = 20.0 cm text1 = “SO = 20.0 cm”S text1_1 = “S”M text1_2 = “M”O text1_3 = “O”/theta text1_4 = “/theta”Screen text1_5 = “Screen”Screen text1_5 = “Screen”Screen text1_5 = “Screen”Screen text1_5 = “Screen”Screen text1_5 = “Screen”Screen text1_5 = “Screen”

an Experimental Setup With Monochromatic Light

In figure a monochromatic light source S of wavelength 440 nm is placed slightly above a plane mirror M is shown.

Choices

Choice (4) Response

a.

2.20mm

b.

1.10mm

c.

2.64mm

d.

0.55mm

f Page
Sign In