Question # 1

A set of frequencies which are multiples of the fundamental frequency are called.

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Doppler effect

Nodal frequencies

Beat frequencies

Hamonics

The error in speed of sound calculated by Newton at STP is about.

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0 %

14 %

15 %

16 %

Critical angle is that incident angle in denser medium for which angle of refraction is.

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0 ^o

45 ^o

90 ^o

120 ^o

The state of human blood flow can be found by using.

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Newton's formula of speed of sound

Interference of sound

Phenomena of beats

Doppler's effect of sound

What would encourage trade between two countries

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Different tax system

Frontier checks

National currencies

reduced tariffs

The efficiency of diesel engine is about

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25% to 30%

35% to 40%

40% to 50%

50% to 60%

A vector is denoted by

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Light face

Bold face

Both a and b

None of these

In vibrating string, the points where the amplitude is maximum are called.

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Nodes

Antinodes

Troughs

Crests

The commercial unit of electric energy is

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Kilo watt hour

watt

Watt hour

Kilo Watt

When sound waves enter in different medium, the quantity that remains unchanged is.

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Intensity

Speed

Frequency

Wave length

1 torr in Nm-2 is expressed as.

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130.5 Nm-2

133.3 N m-2

140.2 Nm-2

135.2 Nm-2

Interplaner distance can be determined by

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Newton's rings

Bragg's law

Diffraction pattern

Interferometer

A typical rocket consumes fuel about

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40000 Kgs-1

30000 Kgs-1

20000 Kg s-1

10000 Kgs-1

Soap film is sunlight appears coloured due to.

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Dispersion of light

Diffraction of light

Scattering of light

Interference fo light

Two tuning forks of frequencies 240 Hz and 243 Hz are sounded together, the number of beats per second is.

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Zero

2

3

4

For working of heat engine, there must be

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A source

A sink

Ether of these

Both of them

The Science of physics based on

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Fundamental Quantities

Hyppthesis

Experimetns and measurement

Only definitaon

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

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