Question # 1

Biomas is a potential source of

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Renewable energy

Non renewable energy

Botha a and b

Tidal energy

The distance between two consecutive wave front is equal to

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One wave length

Two wave length

Half wave length

Three wave length

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

An immediate source of energy for our body is:

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mango

Glucose

mushroom

meat

When a body is vibrating its displacement from mean position

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Remains constant

Changes with time

Become(-)ve

None of these

When the rocket moves away from the earth, the work against gravity

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Remains constant

Varies directly with distance

Varies inversely with distance

Varies inversely with square of distance

Vectors have

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Numerical value

Directional

Both a and b

None of these

the louder the sound, the greater will be its.

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Speed

Frequency

Amplitude

Wave length

the final image obtained by astronomical telescope is.

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Erect

Virtual

Magnified

All of these

Horizontal range is maximum when the angle of projectile is.

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0 o

30 o

45 o

60 o

Second pendulum has a time period

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1 sec

3 sec

2 sec

4 sec

When temperature of source and sink of a heat engine becomes equal then the entropy change will be.

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zero

Minimum

Maximum

Negative

The dimension of pgh has same as that of

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Work

Energy

Pressure

Mass

In case of planets centripetal force is provided by

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Coulomb's force

Electrostatic force

Gravitational force

Magnetic force

The tides raise in the sea roughly

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Once a day

Twice a day

Three a day

Four time a day

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The terminal velocity of a droplet falling down under gravity is directly proportional to the square of

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Its density

Its radius

Its viscosity

Its elasticity

This is used for

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Co-efficient of friction

Co-efficient of expansion

Co-efficient of viscosity

Co-efficient of contraction

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