KVPY Stream-SA (Class 11) Physics: Questions 95 - 97 of 242

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Question number: 95

» Electromagnetic Waves » Electromagnetic Spectrum » Visible

MCQ▾

Question

The reason for choose red colour for danger symbols is,

Choices

Choice (4) Response
a.

Minimum wavelength in visible spectrum

b.

It reflects more than other colour

c.

Maximum wavelength in visible spectrum

d.

It reflect less than other colour

Question number: 96

» Center of Mass » Centre of Mass of a Rigid Body

Appeared in Year: 2014

MCQ▾

Question

A uniform square wooden sheet of side a has its center of mass located at point O as shown in the figure on the left. A square portion of side b of this sheet is cut out to produce as L-shaped sheet as shown in the figure on the right

Uniform square wooden sheet

Uniform Square Wooden Sheet

In figure on left a uniform square wooden sheet of side a has its center of mass located at point O. On right, a square portion of side b of this sheet is cut out to produce as L- shaped sheet.

The center of mass of the L-shaped sheet lies at the point P (in the diagram) when

Choices

Choice (4) Response
a.

ab=(5+1)2

b.

ab=(31)1

c.

ab=512

d.

ab=(3+1)2

Question number: 97

» Properties of Solids & Liquids » Pressure Due to a Fluid Column

MCQ▾

Question

Water flows through a horizontal pipe of variable cross-section. The pressure of water is p at a point where the flow velocity is v. If ρ is the density of the water, the pressure at a point where the flow velocity is 3v will be,

Choices

Choice (4) Response
a.

p2ρv2

b.

p3ρv2

c.

p4ρv2

d.

pρv2

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