Question # 1

According to Newton's formula, the speed of sound in air at STP is

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332 ,ms-1

340 ms-1

350 ms-1

280 ms-1

The fringe spacing in a double slit experiment can be increased by decreasing.

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Wavelength of light

Width of slits

Slit separation

Distance between the slits and the screen

The SI units of flow rate are.

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m2s-1

m3s-2

m3s-1

m2s-2

Pressure of fluid will be low where speed of fluid is.

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Low

Zero

High

Constant

A body of mass 1.0 Kg dropped from the top of a tower of highest 50 m, what will be its K.E. 10 m below the top

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400 J

490 J

49 J

98 J

An athlete runs with a speed of 12 ms-1. Determine the longest jump he can undertake.

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12 m

14.4 m

24 m

16.2 m

Interplaner distance can be determined by

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Newton's rings

Bragg's law

Diffraction pattern

Interferometer

Air blows from

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High pressure to low pressure

Low pressure to high pressure

Low temperature to high temperature

High temperature to low temperature

A force of 100 N makes an angle of 60o with Y- Axis, its horizontal component is.

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50 N

60 N

70.7 N

86.6 N

Stoke's law holds for bodies having.

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Spherical shape

Oblong shape

Rectangular shape

All shapes

When a body moves in circular motion, the angle between linear and angular velocity is.

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180^o

90^o

60^o

75.3^o

The portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

The subtraction of a vector is equivalent to the addition with

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Same direction

Perpendicular direction

Reversed direction

All of these

When a body is vibrating its displacement from mean position

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Remains constant

Changes with time

Become(-)ve

None of these

The shape of trajectory of short range projectile is

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Straight line

Circle

Elliptical

Parabolic

According to Huygen's principle the points on primary wave front can be considered as

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Secondary wavelets

Ray of light

Source of light

None of these

Bending of light around the edges of an obstacle is called.

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Refraction

Polarization

Interference

Diffraction

A man weight 1000 N in a stationary lift. If the lift moves up with an acceleration of 10 ms-2. then its weight becomes.

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1000 N

2000 N

3000 N

0 N

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11th Class Part 1 Physics Test Online MCQs With Answers

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