Question # 1

Biomas is a potential source of

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Renewable energy

Non renewable energy

Botha a and b

Tidal energy

A ray of light is a line

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Parallel to wave front

Normal to wave front

Anti-parallel to wave

Any one of these

The actual efficiency of property turned petrol engine is.

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20% to 30%

30% to 35%

40% to 45%

25% to 30%

The area between velocity time graph and the time axis is numerically equal to.

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?Speed of object

Distance covered by the object

Average velocity of the object

Acceleration of the object.

In the absence of external force, the change in momentum is.

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Zero

Constant

Decreasing

Increasing

In case of point source the shape of wave front is.

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Plane

spherical

Circular

Eliptical

Moment of inertia is measure din

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Kg m2

Kg m-2

Rad s-1

Joule second

When the car moves with an increasing acceleration then its velocity time graph is always

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Constant

Variable

A straight line

A curve

the example of mechanical waves is

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Water waves

Infrared waves

Radio waves

Ultraviolet waves

The frequency of waves produced in microwave oven is

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1435 Hz

2450 MHz

1860 MHz

2850 Hz

The distance between two consecutive crest is called.

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Displacement

Amplitude

Wave front

Wavelength

The Bragg's equation is given by

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Which of the following is not directed along the fixed axis of rotation.

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Angular displacement

Angular momentum

Centripetal acceleration

Angular acceleration

If the slope of a velocity time graph gradually decreases than body is said to be moving with

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Positive acceleration

Negative acceleration

Uniform velocity

None

Which one is renewable source of energy.

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Coal

Uranium

Biomass

Natural gas

The light energy travels in space as waves was firstly proposed by

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Maxwell

Young

Einsten

Hydrogen

An oscillating mass-spring system produces

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Sound waves

Electromagnetic waves

Light waves

Periodic waves

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

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